The correct answer is Mahanadi.
The Mahanadi is a major river in central India. It is the longest river in the state of Chhattisgarh and the sixth longest river in India. The Mahanadi originates in the Amarkantak hills of Madhya Pradesh and flows through the states of Chhattisgarh, Odisha, and Andhra Pradesh. It empties into the Bay of Bengal.
The Mahanadi is a major source of irrigation and drinking water for the people of Chhattisgarh. It is also a major source of hydroelectric power. The Mahanadi is a popular tourist destination, especially during the monsoon season.
The Godavari is the second longest river in India. It originates in the Western Ghats of Maharashtra and flows through the states of Telangana, Andhra Pradesh, Madhya Pradesh, Chhattisgarh, and Odisha. It empties into the Bay of Bengal.
The Krishna is the third longest river in India. It originates in the Western Ghats of Maharashtra and flows through the states of Karnataka, Andhra Pradesh, Telangana, and Maharashtra. It empties into the Bay of Bengal.
The Narmada is the fourth longest river in India. It originates in the Amarkantak hills of Madhya Pradesh and flows through the states of Madhya Pradesh, Gujarat, and Maharashtra. It empties into the Arabian Sea.