UPSC Quiz – 2026 : IASbaba’s Daily Current Affairs Quiz 25th May 2026

Q.1) Solution (d)

Explanation:

Rumen flukes or amphistomes are parasitic trematodes affecting ruminants such as cattle, sheep, goats, and buffaloes. Snails serve as the intermediate host where larval development occurs, making Statement 2 correct. Infection spreads when animals ingest vegetation or water contaminated with metacercariae, the infective larval stage, thus Statement 3 is also correct. “Bottle jaw” refers to submandibular oedema and is a classical symptom of severe infection, validating Statement 4. However, Statement 1 is incorrect because adult parasites live mainly in the rumen, while disease pathology is caused primarily by immature larvae damaging the small intestine. UPSC often frames traps by interchanging the location of adults and larvae in parasitic diseases.

Why this question?
Tests lifecycle-based conceptual clarity and host–parasite interaction traps.

Why important for UPSC?
Livestock diseases increasingly linked with agriculture and veterinary current affairs.

PYQ Pattern Link
Similar elimination logic used in UPSC parasitic disease and vector-host PYQs.

Q.2) Solution (b)

Explanation:

• Pyrite is iron disulfide (FeS₂), a sulfide mineral rather than an oxide mineral; therefore Statement 1 is incorrect. 

• Framboidal pyrite consists of tightly packed raspberry-like microcrystal aggregates, making Statement 2 correct. 

• Sulfur-rich pyrite releases sulfur dioxide during combustion, which contributes significantly to acid rain formation, validating Statement 3. 

• The recently discovered sunflower-structured pyrite in Gujarat represents a rare transitional recrystallised form where larger geometric crystals form around framboidal cores, making Statement 4 correct. 

UPSC frequently tests mineral classification traps by confusing sulfides, oxides, and silicates. The environmental linkage between coal impurities and acid rain adds interdisciplinary relevance.

Why this question?
Introduces mineralogy traps using sulfide-versus-oxide confusion.

Why important for UPSC?
Integrates geography, geology, environment, and industrial pollution themes.

PYQ Pattern Link
Comparable to UPSC questions on minerals, acid rain, and coal impurities.

Q.3) Solution (c)

Explanation:

MIRV stands for Multiple Independently Targetable Re-entry Vehicle. It enables a single ballistic missile to carry multiple warheads capable of striking different targets independently. 

This significantly enhances strategic deterrence by overwhelming missile defence systems and increasing strike flexibility. 

• Option (a) confuses MIRV with hypersonic manoeuvrable glide technologies. 
• Option (b) refers to electronic warfare systems rather than payload architecture. 
• Option (d) describes navigation integration systems used in modern missiles but not MIRV capability itself. 

The recently discussed Russian Oreshnik missile reportedly incorporates MIRV technology. UPSC increasingly focuses on strategic and defence technologies, especially terms frequently appearing in international conflicts and arms-control discussions.

Why this question?
Checks distinction between payload architecture and propulsion/guidance systems.

Why important for UPSC?
Missile technologies increasingly dominate defence and international relations coverage.

PYQ Pattern Link
Similar terminology-based defence technology questions asked in recent prelims.

Q.4) Solution (b)

Explanation:

• QUAD is not a treaty-based military alliance; it is a diplomatic or plurilateral grouping focused on practical Indo-Pacific cooperation. Hence Statement 1 is incorrect. 

• • Statement 2 is correct because former Japanese Prime Minister Shinzo Abe proposed the concept in 2007. 

• QUAD consistently supports freedom of navigation and overflight aligned with UNCLOS principles, making Statement 3 correct. 

• The Quad Maritime Domain Awareness initiative indeed uses satellite-based information sharing to monitor illegal fishing and maritime activities across the Indo-Pacific, validating Statement 4. 

UPSC often creates traps by portraying informal strategic groupings as military alliances. Understanding the distinction between alliance systems and diplomatic forums is crucial in international relations preparation.

Why this question?
Tests strategic-grouping terminology and Indo-Pacific institutional understanding.

Why important for UPSC?
QUAD remains central to India’s evolving Indo-Pacific foreign policy.

PYQ Pattern Link
Resembles UPSC questions differentiating alliances, forums, and multilateral groupings.

Q.5) Solution (c)

Explanation:

Water hyacinth (Eichhornia crassipes) is among the world’s most invasive aquatic weeds. It rapidly forms dense floating mats that block sunlight penetration and reduce dissolved oxygen levels in water bodies, suffocating aquatic ecosystems and affecting fish populations. Hence Option (c) is correct. 

• It does not primarily release toxic alkaloids, making Option (a) incorrect. 
• It also does not significantly alter salinity in freshwater ecosystems, eliminating Option (b). 
• Option (d) is incorrect because the plant harms ecosystems indirectly through ecological disruption rather than predation. 

UPSC often frames invasive-species questions around ecological processes rather than mere factual identification, demanding conceptual understanding of ecosystem functioning.

Why this question?
Focuses on ecosystem-process understanding rather than factual memorisation.

Why important for UPSC?
Invasive species and wetland ecology are recurring environment themes.

PYQ Pattern Link
Comparable to UPSC invasive-species and biodiversity-impact prelims questions.

Correct Answer: (b) 1, 2 and 4 only

Explanation:

• The Idu Mishmi tribe inhabits the Mishmi Hills and Dibang Valley regions of Arunachal Pradesh, making Statement 1 correct. 

• Their cosmology considers tigers as “elder brothers,” and their belief system imposes hunting taboos on several species, validating Statement 2. 

• However, their society is patriarchal and patrilineal rather than matrilineal, making Statement 3 incorrect. 

• Their conservation-centric traditions are increasingly discussed in debates surrounding indigenous ecological knowledge and biodiversity conservation, making Statement 4 correct. 

UPSC often frames tribal questions around cultural geography, social organisation, and conservation linkages simultaneously, requiring integrated understanding rather than isolated facts.

Why this question?
Combines tribal culture, ecology, and social organisation in one framework.

Why important for UPSC?
Tribal conservation ethics increasingly feature in environment and culture syllabus.

PYQ Pattern Link
Comparable to UPSC questions on Bishnois, sacred groves, and PVTGs.