Q. The longest tributary of Krishna River is:
Answer: Bhima River
Notes: The largest tributary of the Krishna River is the Tungabhadra River with a drainage basin measuring 71,417 km2, running for about 531 km, but the longest tributary is the Bhima River, which makes a total run of 861 km and has an equally large drainage area of 70,614 km2.

The above question is part of Karnataka General Studies MCQ Series Course on GKToday Android app.