The correct answer is Mahanadi.
The Mahanadi is the largest river in Chhattisgarh. It originates in the Amarkantak hills of Madhya Pradesh and flows through Chhattisgarh, Odisha, and Andhra Pradesh before emptying into the Bay of Bengal. The Mahanadi is a major source of irrigation and drinking water for millions of people in the region. It is also a popular tourist destination, known for its scenic beauty and its many temples and historical sites.
The Indravati is the second largest river in Chhattisgarh. It originates in the Eastern Ghats and flows through the Bastar district of Chhattisgarh before joining the Mahanadi. The Indravati is a major source of hydroelectric power for Chhattisgarh.
The Arpa is a tributary of the Mahanadi. It originates in the Korba district of Chhattisgarh and flows through the Bilaspur district before joining the Mahanadi. The Arpa is a major source of irrigation and drinking water for the people of Chhattisgarh.
The Shivnath is a tributary of the Mahanadi. It originates in the Surguja district of Chhattisgarh and flows through the Raigarh district before joining the Mahanadi. The Shivnath is a major source of irrigation and drinking water for the people of Chhattisgarh.