State PCS 2021 Q63 — General Studies PYQ with Answer

Given below are two statements, one is labelled as Assertion (A) and other as Reason (R):
Assertion (A): Teesta river was earlier a tributary of Ganga now it is a tributary of Brahmaputra.
Reason (R): River capturing is a major feature of Himalayan rivers.
Select the correct answer using the codes given below.