Explanation:

- The Godavari River is often called the 'Dakshin Ganga' or the 'Ganges of the South' due to its length and the extensive area it covers in Southern India.

- The Krishna River is not typically referred to as 'Dakshin Ganga', though it is another major river of south India, the second longest river after Godavari.

- The Sutlej River is one of the easternmost tributaries of the Indus River, primarily flowing through northern India and Pakistan. It has no association with the term 'Dakshin Ganga'.

- The Mahanadi River flows through central and eastern India, but it is not referred to as 'Dakshin Ganga'.