Official Answer Key & Detailed Solution
Ready to check the official UPSC Answer Key?
Click any option above to test yourself under exam conditions, or reveal the explanation directly.
Correct Answer: Option (B) — A – 3; B – 1; C – 2; D – 5
Concept & Option Breakdown
Standard Reference Verified- A matches 3: Deccan Traps were formed by massive basaltic fissure eruptions during the Late Cretaceous to Early Eocene period.
- B matches 1: The Western Ghats underwent block faulting and uplift during the Late Cenozoic (Tertiary) era.
- C matches 2: The Aravalli Range is an ancient relict fold mountain system dating back to the Pre-Cambrian era.
- D matches 5: The older alluvium and valley fills of the Narmada-Tapi basins date to the Pleistocene epoch.
Aravallis are among the oldest Pre-Cambrian ranges (C -> 2), and Deccan Traps are Cretaceous flood basalts (A -> 3), immediately identifying (b).
Practice Full-Length & Sectional Prelims Mocks on this Interface
50 simulated tests in the APT Prelims Test Series (₹1,493) or 1-on-1 Mentorship with Avinash Sir.