UPSC Quiz – 2026 : IASbaba’s Daily Current Affairs Quiz 4th September 2026

Solution (b)
Explanation:
Polychaetes are marine annelids commonly called bristle worms; their numerous chaetae and paired parapodia are characteristic features. Hence, Statement 1 is correct. Statement 2 is incorrect because, although most polychaetes are marine, some can tolerate low-salinity environments; therefore, they are not restricted exclusively to fully saline conditions. Statement 3 is correct because polychaetes contribute to sediment aeration, organic-matter breakdown and nutrient cycling, particularly within benthic ecosystems. Statement 4 is also correct: increasing demand for wild polychaetes as aquaculture feed has raised concerns regarding excessive harvesting and consequent disturbance of benthic habitats. Thus, the correct combination is 1, 3 and 4. The question tests the distinction between “predominantly marine” and “exclusively marine,” a typical UPSC elimination trap.
Why this question?
The trap lies in converting “predominantly marine” into an absolute ecological characteristic.
Why important for UPSC?
It links marine biodiversity, benthic ecology, decomposition and sustainable aquaculture resource management.
PYQ Pattern Link
UPSC frequently tests organism–habitat–ecological function combinations through carefully worded statements.

Solution (b)
Explanation:
Khagantak-243 is described as a 300-kg-class, airborne, long-range stand-off precision-guided glide bomb. After release from a fighter aircraft, it uses aerodynamic lift to glide towards its target rather than following a conventional free-fall trajectory. Therefore, option (b) correctly captures its defining principle. Option (a) is incorrect because glide bombs are generally unpowered after release, unlike missiles that generally possess propulsion. Option (c) is incorrect because the bomb is released from the aircraft and subsequently travels independently. Option (d) is incorrect because ballistic re-entry is not the defining mechanism of a glide bomb. Its importance lies in enabling aircraft to engage targets from stand-off distances, thereby reducing exposure to heavily defended airspace.
Why this question?
It tests the often-confused distinction between glide bombs and powered missile systems.
Why important for UPSC?
Defence technology questions increasingly test underlying technological principles rather than merely weapon names.
PYQ Pattern Link
Similar UPSC questions distinguish weapon systems through propulsion, guidance, trajectory and operational characteristics.

Solution (c)
Explanation:
Sepsis should not be understood as a particular infection or as a disease caused exclusively by bacteria. It is a life-threatening condition in which the body’s extreme immune response to an infection causes organ dysfunction. Therefore, Statement 1 is incorrect, while Statement 2 is correct. Statement 3 is correct because antimicrobial resistance enables microorganisms to survive medicines that previously killed them, making severe infections more difficult to treat. Statement 4 is also correct because sepsis can result from bacterial, viral, fungal or parasitic infections. Common sources include infections affecting the lungs, urinary tract, kidneys and abdomen. The conceptual trap is therefore the distinction between the infection itself and the host’s systemic response to infection, an important distinction in understanding AMR and sepsis.
Why this question?
The key trap is mistaking sepsis for a particular pathogen-specific infection.
Why important for UPSC?
It connects public health, antimicrobial resistance, infectious diseases and emerging global health challenges.
PYQ Pattern Link
UPSC often tests medical concepts by distinguishing a condition’s mechanism from its underlying cause.

Solution (b)
Explanation:
Cold allodynia is a neuropathic pain condition in which normally non-painful cold stimuli are perceived as painful or distressing. Hence, Statement 1 is correct. Oxaliplatin, a platinum-based chemotherapy drug, is a major trigger of chemotherapy-induced peripheral neuropathy and associated cold sensitivity, making Statement 2 correct. Statement 3 is incorrect because the identified LPBN–PF pathway involves the lateral parabrachial nucleus in the brainstem and the parafascicular region of the thalamus; these are central nervous system structures, not components of the peripheral nervous system. Statement 4 is therefore correct. The study is significant because it demonstrates how peripheral nerve damage associated with chemotherapy can produce persistent alterations in central neural circuits involved in sensory and affective-motivational processing of pain.
Why this question?
It exploits the peripheral-versus-central nervous system distinction within chemotherapy-induced neuropathic pain.
Why important for UPSC?
It combines biomedical terminology with brain anatomy and mechanisms of sensory processing.
PYQ Pattern Link
UPSC science questions frequently test whether a physiological structure belongs to central or peripheral systems.

Solution (c)
Explanation:
The Pacific Islands Forum was established in 1971 and is described as the Pacific region’s principal political and economic organisation. Its areas of focus include regional security, sustainable economic development, climate change, ocean governance and regionalism under the 2050 Strategy for the Blue Pacific Continent. Therefore, option (c) is correct. Option (a) is incorrect because the PIF is not limited exclusively to island states; Australia and New Zealand are members. Option (b) is incorrect because it is not primarily a military alliance. Option (d) is incorrect because it is neither a UN specialised agency nor headquartered in Port Moresby; its headquarters is in Suva, Fiji. India engages with Pacific countries through mechanisms including FIPIC and the Act East Policy.
Why this question?
The principal trap is confusing a regional political organisation with an exclusive island-state or military grouping.
Why important for UPSC?
PIF connects Indo-Pacific geopolitics, climate vulnerability, ocean governance and India’s Act East Policy.
PYQ Pattern Link
UPSC frequently tests international organisations through membership, headquarters, mandate and regional grouping distinctions.