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 (D) — 3 only
Concept & Option Breakdown
Standard Reference Verified- Pair 1 is incorrectly matched: The Chambal River originates in the Vindhyan range and is a major right-bank tributary of the Yamuna River (not the Narmada).
- Pair 2 is incorrectly matched: The Sone River originates on the Amarkantak Plateau and is a major right-bank tributary of the Ganga River (not the Yamuna), joining it near Patna.
- Pair 3 is correctly matched: The Manas River is a transboundary river flowing from the Bhutanese Himalayas into Assam, where it joins the Brahmaputra as a right-bank tributary.
Chambal and Son are well-known north/northeast flowing rivers: Chambal joins the Yamuna, and Son joins the Ganga directly.
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.