Which Indian geography term is associated with location or extent “lies south of the Himalayas” and also with “formed mainly by the Indus, Ganga and Brahmaputra river systems”?

Correct Answer: Option B — Northern Plains. Northern Plains is correct because it is lies south of the Himalayas. It is also associated with formed mainly by the Indus, Ganga and Brahmaputra river systems, which provides a second reliable identifying clue. These features are standard physical-geography facts and are useful for map-based and statement-based competitive-exam questions. Why the other options are incorrect: Option A — Peninsular Plateau: It is lies south of the Northern Plains; this is the specific geographical association of Peninsular Plateau. Option C — Thar Desert: It is lies mainly in western Rajasthan; this is the specific geographical association of Thar Desert. Option D — Western Coastal Plain: It is lies between the Western Ghats and the Arabian Sea; this is the specific geographical association of Western Coastal Plain. Exam Takeaway: Connect Northern Plains with “lies south of the Himalayas” for quick revision.