UPSC Prelims 2026 · CSAT Paper 2 · Set DLogical ReasoningQ 16 / 80

UPSC Prelims 2026 CSAT Paper 2 — Question 16

Question

There are four statements X, Y, Z and W. Their relations are as follows: If X is incorrect, then so is Z; if Y is incorrect, then W is correct; if W is correct, then X is incorrect. Which of the following is/are correct? I. If X is correct, then so is Y. II. If Z is correct, then it is not necessary that Y is correct. Select the answer using the code given below.

(a)I only
(b)II only
(c)Both I and II
(d)Neither I nor II

UnlockIAS answer: (a)I only

Solution

If X is correct, then W must be incorrect (contrapositive of "W correct → X incorrect"), and Y incorrect would force W correct — a contradiction — so Y is correct. Statement I holds; II does not.

UnlockIAS expert key, prepared 24 May 2026 and cross-verified by re-deriving the answer — this is our key, not the official UPSC provisional key (awaited).

Section

Logical Reasoning

Topic Reference

Logical Reasoning — Truth statements

Official UPSC key still awaited

UPSC has announced (PIB Release 2262441, 18 May 2026) that the provisional answer key for CSE Prelims 2026 will be released “soon after Exam”. Until then, use the CSAT score calculator for your qualifying-status estimate, and join the per-question discussion below.

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Official Notification

PIB Release 2262441

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