The longest flowing river in India is-

Explanation

The lengths of the major rivers of India are as follows— | River Name | Length | | :--- | :--- | | Ganga | – 2525 km | | Godavari | – 1465 km | | Narmada | – 1312 km | | Mahanadi | – 851 km | Thus, it is clear that the Ganga is the longest river of India.