Which Indian geography term is associated with identity or classification “an extensive alluvial plain” and also with “lies south of the Himalayas”?

Correct Answer: Option A — Northern Plains. Northern Plains is correct because it is an extensive alluvial plain. It is also associated with lies south of the Himalayas, 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 B — Peninsular Plateau: It is an ancient tableland composed largely of crystalline rocks; this is the specific geographical association of Peninsular Plateau. Option C — Thar Desert: It is an arid sandy region also called the Great Indian Desert; this is the specific geographical association of Thar Desert. Option D — Western Coastal Plain: It is a narrow coastal lowland along the Arabian Sea; this is the specific geographical association of Western Coastal Plain. Exam Takeaway: Connect Northern Plains with “an extensive alluvial plain” for quick revision.