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GS Paper IUPSC Prelims 2001
Health & Medicine
Question No. 479Interactive Test Mode
00:00
+2-0.66

Q479. Consider the following statements 1. Tapeworm is a hermaphrodite. 2. Round-worm has separate sexes. 3. Filaria is caused by a nematode. 4. Guinea-worm is an annelid. Which of these are correct?

Consider the following statements

  1. Tapeworm is a hermaphrodite.
  2. Round-worm has separate sexes.
  3. Filaria is caused by a nematode.
  4. Guinea-worm is an annelid. Which of these are correct?
Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2001 • Science and Technology

Correct Answer: Option (B) — 1, 2 and 3

Concept & Option Breakdown

Standard Reference Verified

• Statement 1 is correct: Tapeworms (Phylum Platyhelminthes, Class Cestoda) are hermaphroditic (monoecious); each mature proglottid contains both male and female reproductive systems. • Statement 2 is correct: Roundworms (Ascaris, Phylum Nematoda) are dioecious (unisexual) with distinct male and female individuals. • Statement 3 is correct: Filariasis is caused by parasitic filarial nematodes such as Wuchereria bancrofti and Brugia malayi. • Statement 4 is incorrect: Guinea worm (Dracunculus medinensis) is a nematode (roundworm), not an annelid (segmented worm).

Elimination Heuristic & Exam Approach

Eliminate statement 4 since Guinea worm is a roundworm (nematode), leaving (a) or (b). Since filaria is undeniably caused by a nematode (Wuchereria), statement 3 is correct, confirming (b).

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2001 (Q479)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (B) — 1, 2 and 3

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Frequently Asked Questions — UPSC Prelims 2001 Q479

What is the official answer for UPSC Prelims 2001 GS Paper I Question 479 (Science and Technology)?

The official UPSC answer key for this 2001 Science and Technology (Health & Medicine) question is Option (B): "1, 2 and 3". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2001 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Health & Medicine UPSC Prelims question using option elimination?

Eliminate statement 4 since Guinea worm is a roundworm (nematode), leaving (a) or (b). Since filaria is undeniably caused by a nematode (Wuchereria), statement 3 is correct, confirming (b).

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