Q. Which of the following is the largest tributary of Indus River?
Explanation: The Chenab is the largest tributary of the Indus. It is formed by two streams, the Chandra and the Bhaga, which join at Tandi near Keylong in Himachal Pradesh.
Hence, it is also known as Chandrabhaga. The river flows for 1,180 km before entering into Pakistan.
Source: NCERT – Fundamental of Physical Geography