The correct answer is option 2, Godavari. The Godavari River is the largest peninsular river in India. It is located in the southern part of the country and flows through the states of Maharashtra, Telangana, Andhra Pradesh, and Odisha.
Option 1, Krishna, is another important river in India but it is not the largest peninsular river. Krishna River flows through the states of Maharashtra, Karnataka, and Andhra Pradesh.
Option 3, Cauvery, is another major river in the southern part of India but it is not the largest peninsular river. The Cauvery River flows through the states of Karnataka and Tamil Nadu.
Option 4, Mahanadi, is a river that flows through the state of Odisha in eastern India. It is also not the largest peninsular river in India.
Therefore, the largest peninsular river in India is the Godavari River.