Official Answer Key & Detailed Solution
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Correct Answer: Option (C) — 1971 Census
Concept & Option Breakdown
Standard Reference VerifiedOption (c) is correct: Under Article 55 of the Constitution (as modified by the 42nd Amendment Act, 1976 and later extended by the 84th Amendment Act, 2001 until the first census taken after 2026), the population of states for the purpose of the Presidential election is frozen as ascertained in the 1971 Census.
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