Q. Which of the following river is the longest tributary of the Brahmaputra river?
Answer: Subarnasiri
Notes: Subarnasiri river is the longest (442 kilometers) tributary of the Brahmaputra river. It flows in the state of Assam and Arunachal Pradesh. Miri hills is separated from Abor hill by this river.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 214 in 6. Drainage System, Rivers, Lakes, Waterfalls, Other Water Bodies in above course in App.