Explanation:

- The Godavari River is the longest river in peninsular India and has the largest drainage basin.

- Mahanadi River is known for its fertile delta region but has a smaller drainage basin compared to Godavari.

- Narmada River runs westwards and its drainage basin is considerably smaller than that of Godavari.

- Krishna River is one of the longest rivers in the southern region but also has a smaller drainage basin than Godavari.

- Godavari River has the largest drainage basin of the peninsular rivers listed.