Official Answer Key & Detailed Solution
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Correct Answer: Option (A) — 2-4-3-1
Concept & Option Breakdown
Standard Reference Verified- Formation of Bangladesh: 16 December 1971 (following the Indo-Pak War).
- Pokhran-I (Smiling Buddha): 18 May 1974 (India's first nuclear test).
- Sikkim Statehood: 16 May 1975 (became the 22nd state through the 36th Constitutional Amendment Act).
- SLV-3 Launch: 18 July 1980 (successfully placed the Rohini satellite RS-1 into orbit under Project Director Dr. A.P.J. Abdul Kalam).
Chronological order: 2 -> 4 -> 3 -> 1.
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