UPSC current affairs quiz, 12 October 2026
30 Prelims-style questions on the day's news, in the formats UPSC uses (statement-based, How many, Statement-I and II), each with the answer and an explanation. Try each one before you open the answer.
Supreme Court, in a Sunday sitting, bars illegal detention of peaceful protesters in Delhi
With reference to Section 163 of the Bharatiya Nagarik Suraksha Sanhita, 2023, which one of the following statements is correct?
- It is the provision for preventive detention of persons for up to one year without trial.
- It empowers a magistrate to issue orders in urgent cases of nuisance or apprehended danger, and it replaces Section 144 of the CrPC.
- It allows the Union Government to suspend telecom services in a district.
- It empowers the High Court to issue writs for the enforcement of fundamental rights.
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Answer: (b) It empowers a magistrate to issue orders in urgent cases of nuisance or apprehended danger, and it replaces Section 144 of the CrPC.. Section 163 of the BNSS deals with urgent cases of nuisance or apprehended danger and is the successor to Section 144 of the CrPC. Preventive detention comes from separate laws under Article 22, telecom suspensions from telecom law, and writ power from Article 226.
Consider the following statements about the Supreme Court's directions of 11 October 2026 on the Delhi protests:
1. No person is to be detained except in accordance with the procedure established by law.
2. The Court quashed all prohibitory orders under Section 163 of the BNSS across Delhi.
3. The Court directed that barricades be reviewed forthwith.
How many of the statements given above are correct?- Only one
- Only two
- All three
- None
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Answer: (b) Only two. Statement 1 is correct: it is the core direction. Statement 2 is incorrect: the Court did not quash all Section 163 orders; it singled out detentions outside the zones where such orders operate and ordered removal of a Section 163 board near the Supreme Court. Statement 3 is correct.
Consider the following statements:
Statement-I: A peaceful and unarmed assembly held outside the area covered by a prohibitory order is, in principle, lawful.
Statement-II: Article 19(1)(b) guarantees citizens the right to assemble peaceably and without arms, and a prohibitory order applies only to the area it specifies.
Which one of the following is correct in respect of the above statements?- Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
- Both Statement-I and Statement-II are correct and Statement-II does not explain Statement-I
- Statement-I is correct but Statement-II is incorrect
- Statement-I is incorrect but Statement-II is correct
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Answer: (a) Both Statement-I and Statement-II are correct and Statement-II explains Statement-I. Both are correct, and Statement-II explains Statement-I: the right exists under Article 19(1)(b), and the restriction of a Section 163 order operates only within its defined area.
Consider the following grounds:
1. Sovereignty and integrity of India
2. Public order
3. Friendly relations with foreign States
4. Decency or morality
How many of the above are grounds on which the right to assemble peaceably and without arms can be restricted under Article 19(3)?- Only one
- Only two
- Only three
- All four
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Answer: (b) Only two. Article 19(3) permits restrictions on assembly only in the interests of the sovereignty and integrity of India or public order. Friendly relations with foreign States and decency or morality are grounds under Article 19(2) for speech, not for assembly. So only two.
Which of the following statements is/are correct?
1. A petition for habeas corpus to enforce a fundamental right can be filed directly in the Supreme Court under Article 32.
2. The writ of habeas corpus can be issued only against a public authority and never against a private person.
Select the correct answer using the code given below.- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
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Answer: (a) 1 only. Statement 1 is correct: Article 32 lets a person move the Supreme Court directly. Statement 2 is incorrect: habeas corpus can be issued against both public authorities and private individuals who detain a person.
In the context of protest jurisprudence, the Supreme Court's judgment in Amit Sahni v. Commissioner of Police (2020) is associated with which one of the following?
- Banning all protests at Jantar Mantar
- Holding that public ways cannot be occupied indefinitely for protest
- Declaring access to the internet a fundamental right in itself
- Striking down Section 144 of the CrPC
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Answer: (b) Holding that public ways cannot be occupied indefinitely for protest. Amit Sahni concerned the Shaheen Bagh sit-in; the Court held that public ways and spaces cannot be occupied indefinitely. It did not ban Jantar Mantar protests (MKSS 2018 rejected a blanket ban), did not strike down Section 144, and Anuradha Bhasin (not Amit Sahni) dealt with internet restrictions.
Op-ed: At 21, the RTI Act's duty of proactive disclosure is still widely ignored
Under the Right to Information Act, 2005, the obligation of public authorities to publish certain categories of information on their own, without any request, is contained in:
- Section 4
- Section 6
- Section 8
- Section 19
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Answer: (a) Section 4. Section 4 contains the obligations of public authorities, including suo motu disclosure of 17 categories under Section 4(1)(b). Section 6 deals with the request for information, Section 8 with exemptions and Section 19 with appeals.
Consider the following statements about the Right to Information Act, 2005:
1. It was enacted on 15 June 2005 and came fully into force on 12 October 2005.
2. Section 4(1)(b) lists 17 categories of information to be published suo motu.
3. A Public Information Officer who fails to publish Section 4 information can be fined ₹250 a day under the Act's express provision on proactive disclosure.
How many of the statements given above are correct?- Only one
- Only two
- All three
- None
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Answer: (b) Only two. Statement 1 is correct. Statement 2 is correct: clauses (i) to (xvii). Statement 3 is incorrect: the ₹250-a-day penalty in Section 20(1) relates to refusing, delaying or obstructing requests and similar defaults, not to an express penalty for Section 4 non-compliance; this absence is a criticism raised about proactive disclosure.
Consider the following statements:
Statement-I: Poor compliance with proactive disclosure under Section 4 of the RTI Act tends to increase the number of RTI applications.
Statement-II: When information that must be published is not available, citizens have to file individual requests to obtain it.
Which one of the following is correct in respect of the above statements?- Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
- Both Statement-I and Statement-II are correct and Statement-II does not explain Statement-I
- Statement-I is correct but Statement-II is incorrect
- Statement-I is incorrect but Statement-II is correct
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Answer: (a) Both Statement-I and Statement-II are correct and Statement-II explains Statement-I. Both statements are correct, and Statement-II explains Statement-I: missing proactive disclosures push citizens to the request route, raising applications and pendency.
Consider the following items:
1. Budget allocated to each agency of the public authority
2. Monthly remuneration of its officers and employees
3. Names and particulars of its Public Information Officers
4. Manner of execution of subsidy programmes and details of beneficiaries
How many of the above are among the categories that Section 4(1)(b) of the RTI Act requires a public authority to publish?- Only one
- Only two
- Only three
- All four
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Answer: (d) All four. All four are among the 17 clauses: budget (xi), monthly remuneration (x), PIO particulars (xvi), and subsidy programmes and beneficiaries (xii).
Which of the following statements is/are correct?
1. Under the DoPT guidelines, the transparency audit of Section 4 disclosures is to be carried out by a third party.
2. In 2020-21, more than half of all public authorities had their suo motu disclosures audited.
Select the correct answer using the code given below.- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
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Answer: (a) 1 only. Statement 1 is correct: the guidelines mandate a third-party audit. Statement 2 is incorrect: only 754 of 2,275 authorities, about one-third, were audited in 2020-21.
Consider the following statements:
1. Section 4(2) of the RTI Act asks public authorities to make constant efforts to provide information suo motu so that the public has minimum resort to RTI requests.
2. Section 4(4) requires information to be disseminated keeping in view cost-effectiveness and local language.
3. The Central Information Commission hears second appeals and complaints under the Act.
How many of the statements given above are correct?- Only one
- Only two
- All three
- None
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Answer: (c) All three. All three are correct. Section 4(2) sets the constant endeavour to disclose suo motu; Section 4(4) covers cost-effectiveness, local language and electronic format; and the CIC is the second appellate and complaint body for Central public authorities.
Heat-induced sex reversal makes frogs more vulnerable to extinction, study finds
With reference to 'sex reversal' in amphibians, recently in the news, which one of the following statements is correct?
- It is a change in the chromosomes of an adult frog caused by viral infection.
- It is the development of an individual into the sex opposite to its genetic sex because environmental factors such as temperature override genetic sex determination.
- It occurs only in reptiles, whose sex is fixed entirely by nest temperature.
- It is a breeding technique used in captive conservation to produce more females.
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Answer: (b) It is the development of an individual into the sex opposite to its genetic sex because environmental factors such as temperature override genetic sex determination.. Sex reversal means the phenotypic sex differs from the genetic sex because an environmental factor, such as heat during the tadpole stage, overrides the genetic signal. In the agile frog study, XX tadpoles exposed to heat became fertile males. Chromosomes do not change; it is not limited to reptiles; and it is not a captive-breeding technique.
Consider the following statements about the 2026 study on agile frogs:
1. Sex-reversed males were genetically male but looked female.
2. All offspring of sex-reversed males were genetically female.
3. Sex-reversed males sired a share of egg masses smaller than their share of adult males.
How many of the statements given above are correct?- Only one
- Only two
- All three
- None
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Answer: (b) Only two. Statement 1 is incorrect: sex-reversed males were genetically female (XX) but physically male. Statement 2 is correct: an XX father can pass on only X chromosomes, so all offspring were XX. Statement 3 is correct: about 20% of males sired only about 4% of egg masses.
Consider the following statements:
Statement-I: Heat-induced sex reversal may fail to offset male-biased sex ratios caused by warming in agile frog populations.
Statement-II: Sex-reversed males in the wild sire disproportionately few offspring, and their offspring are more vulnerable to ranavirus after heat stress.
Which one of the following is correct in respect of the above statements?- Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
- Both Statement-I and Statement-II are correct and Statement-II does not explain Statement-I
- Statement-I is correct but Statement-II is incorrect
- Statement-I is incorrect but Statement-II is correct
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Answer: (a) Both Statement-I and Statement-II are correct and Statement-II explains Statement-I. Both are correct and Statement-II explains Statement-I: because sex-reversed males breed poorly and pass on vulnerability, they cannot compensate for the loss of females.
Consider the following statements:
1. Amphibians are the most threatened class of vertebrates according to the second IUCN Global Amphibian Assessment.
2. That assessment found that disease remained the leading cause of amphibian status declines after 2004.
3. About 40% of assessed amphibian species are globally threatened.
How many of the statements given above are correct?- Only one
- Only two
- All three
- None
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Answer: (b) Only two. Statements 1 and 3 are correct (40.7% of 8,011 species). Statement 2 is incorrect: disease was the leading cause in the 2004 assessment, but climate change became the leading driver of declines thereafter.
Which of the following statements is/are correct?
1. In the agile frog study, tadpoles in the heat treatment were raised at about 28°C for six days.
2. The study found that offspring of sex-reversed fathers died at a higher rate from ranavirus than offspring of typical fathers.
Select the correct answer using the code given below.- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
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Answer: (a) 1 only. Statement 1 is correct (about 28°C against 17°C controls). Statement 2 is incorrect: survival did not differ by father type; what differed was virus load, which was higher in heat-exposed froglets of sex-reversed fathers.
Consider the following animals:
1. Agile frog
2. Sea turtles
3. Humans
4. Domestic chicken
How many of the above are animals in which temperature during early development can alter the sex of individuals?- Only one
- Only two
- Only three
- All four
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Answer: (b) Only two. In agile frogs, heat can sex-reverse XX tadpoles into males, and in many sea turtles nest temperature decides sex. In humans (XX/XY) and chickens (ZW/ZZ), sex is fixed by chromosomes. So only two.
Explained: India's three-part Black Sea truce plan for the Russia-Ukraine war
Which one of the following countries does NOT have a coastline on the Black Sea?
- Bulgaria
- Georgia
- Moldova
- Romania
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Answer: (c) Moldova. The six Black Sea littoral states are Türkiye, Bulgaria, Romania, Ukraine, Russia and Georgia. Moldova is landlocked, lying between Romania and Ukraine.
Consider the following statements about the Black Sea Grain Initiative:
1. It was signed in Istanbul in July 2022.
2. India was a signatory to it.
3. It ended when Russia did not extend its participation in July 2023.
How many of the statements given above are correct?- Only one
- Only two
- All three
- None
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Answer: (b) Only two. Statements 1 and 3 are correct. Statement 2 is incorrect: the signatories were Russia, Ukraine, Türkiye and the UN; India was not a party.
Consider the following statements:
Statement-I: Türkiye has significant influence over naval traffic into and out of the Black Sea.
Statement-II: The Bosphorus and the Dardanelles, the only sea link between the Black Sea and the Mediterranean, are governed by the Montreux Convention under which Türkiye controls the Straits.
Which one of the following is correct in respect of the above statements?- Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
- Both Statement-I and Statement-II are correct and Statement-II does not explain Statement-I
- Statement-I is correct but Statement-II is incorrect
- Statement-I is incorrect but Statement-II is correct
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Answer: (a) Both Statement-I and Statement-II are correct and Statement-II explains Statement-I. Both are correct and Statement-II explains Statement-I: Türkiye's control of the Straits under the 1936 Montreux Convention gives it influence over Black Sea access.
Consider the following countries:
1. Georgia
2. Bulgaria
3. Moldova
4. Romania
How many of the above have a coastline on the Black Sea?- Only one
- Only two
- Only three
- All four
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Answer: (c) Only three. Georgia, Bulgaria and Romania border the Black Sea. Moldova is landlocked. So three.
With reference to recent diplomacy on the Russia-Ukraine war, which of the following statements is/are correct?
1. Ukraine's Foreign Minister described India's proposal as the most comprehensive of the four proposals Kyiv had received.
2. Russia formally accepted India's three-part proposal in October 2026.
Select the correct answer using the code given below.- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
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Answer: (a) 1 only. Statement 1 is correct (Andrii Sybiha). Statement 2 is incorrect: President Putin praised PM Modi's ideas, but Russia had not formally responded to the plan.
The 'Montreux Convention', sometimes seen in the news, relates to:
- Protection of migratory waterbirds
- The regime of the Turkish Straits
- Limits on fishing in the Black Sea
- Nuclear safety at power plants in conflict zones
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Answer: (b) The regime of the Turkish Straits. The Montreux Convention (1936) governs passage through the Bosphorus and the Dardanelles, giving Türkiye control over the Straits.
Indo-French TRISHNA thermal imaging satellite expected to launch in 12 to 16 months
With reference to the TRISHNA mission, consider the following statements:
1. It is a joint mission of ISRO and the French space agency CNES.
2. Its primary purpose is to measure land surface temperature to assess water stress and evapotranspiration.
3. It will be placed in a geostationary orbit to provide continuous coverage of India.
Which of the statements given above are correct?- 1 and 2 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
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Answer: (a) 1 and 2 only. Statements 1 and 2 are correct. Statement 3 is incorrect: TRISHNA will fly in a sun-synchronous orbit at about 761 km, revisiting each point at the equator every three days, not in geostationary orbit at about 36,000 km.
Consider the following statements about TRISHNA:
1. The thermal infrared instrument is being developed by CNES.
2. The satellite platform (bus) is being built by ISRO.
3. It will provide images at a resolution finer than 1 m.
How many of the statements given above are correct?- Only one
- Only two
- All three
- None
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Answer: (b) Only two. Statements 1 and 2 are correct. Statement 3 is incorrect: camera resolution is 57 to 90 m, with 60 m products, fine for field-scale thermal mapping but far from sub-metre imagery.
Consider the following statements:
Statement-I: A crop under water stress tends to show a higher surface temperature than a well-watered crop.
Statement-II: Transpiration cools leaves, and a plant short of water transpires less.
Which one of the following is correct in respect of the above statements?- Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
- Both Statement-I and Statement-II are correct and Statement-II does not explain Statement-I
- Statement-I is correct but Statement-II is incorrect
- Statement-I is incorrect but Statement-II is correct
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Answer: (a) Both Statement-I and Statement-II are correct and Statement-II explains Statement-I. Both are correct and Statement-II explains Statement-I: reduced transpiration means less evaporative cooling, so stressed crops are warmer, which a thermal sensor can detect.
Consider the following satellites:
1. Megha-Tropiques
2. SARAL
3. Oceansat-2
4. TRISHNA
How many of the above are joint missions of ISRO and CNES?- Only one
- Only two
- Only three
- All four
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Answer: (c) Only three. Megha-Tropiques (2011), SARAL (2013) and TRISHNA are Indo-French missions. Oceansat-2 is an ISRO satellite. So three.
Which of the following statements about a sun-synchronous orbit is/are correct?
1. A satellite in it passes over a given place at about the same local solar time on each pass.
2. It is a near-polar orbit.
Select the correct answer using the code given below.- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
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Answer: (c) Both 1 and 2. Both are correct. A sun-synchronous orbit is a near-polar low Earth orbit whose plane precesses so that the satellite crosses each latitude at the same local solar time, which helps compare images over time.
SARAL, an Indo-French satellite launched in 2013, carried the AltiKa instrument. AltiKa was mainly used to measure:
- Rainfall over the tropics
- Sea surface height
- Land surface temperature
- Atmospheric ozone
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Answer: (b) Sea surface height. AltiKa is an altimeter that measures sea surface height, used in ocean studies and climate prediction. Rainfall and the tropical water cycle were the focus of Megha-Tropiques; land surface temperature is the focus of TRISHNA.