Answer : 4. "गोदावरी"
Explanation :

1. Godavari River is also known as 'Dakshin Ganga' i.e. “Ganga River of South India”.

2. Godavari River is the largest river of South India.

3. The Godavari River flows in northwestern Maharashtra state before flowing eastward across the broad Deccan plateau (Peninsular India).