The correct answer is (c), Godavari. The Godavari is the longest river in India, flowing eastwards from the Western Ghats to the Bay of Bengal. It is also one of the most important rivers in the country, both culturally and economically. The Godavari is known as the Ganga of the South because of its religious significance and its role in the lives of millions of people.
The Cauvery is the second longest river in India, flowing southwards from the Western Ghats to the Bay of Bengal. It is also an important river, both culturally and economically. However, it is not as sacred as the Godavari and is not known as the Ganga of the South.
The Krishna is the third longest river in India, flowing eastwards from the Western Ghats to the Bay of Bengal. It is also an important river, both culturally and economically. However, it is not as sacred as the Godavari and is not known as the Ganga of the South.
The Narmada is a river in central India, flowing westwards from the Vindhya Mountains to the Arabian Sea. It is an important river, both culturally and economically. However, it is not as sacred as the Godavari and is not known as the Ganga of the South.