The correct answer is: d) Mahanadi.
The Hirakud Dam is a large concrete gravity dam on the Mahanadi River in the state of Odisha, India. It is the second largest dam in India by volume and the largest earth-filled dam in the world. The dam was constructed between 1948 and 1962 to provide irrigation, flood control, and hydroelectric power. It is also a major tourist attraction.
The Brahmani River is a tributary of the Mahanadi River. It originates in the Eastern Ghats and flows through the states of Odisha and Jharkhand. The Baitarani River is another tributary of the Mahanadi River. It originates in the Eastern Ghats and flows through the states of Odisha and Andhra Pradesh. The Rushikulya River is a tributary of the Brahmani River. It originates in the Eastern Ghats and flows through the state of Odisha.
The Hirakud Dam has a significant impact on the environment. It has caused the displacement of over100,000 people and has disrupted the natural flow of the Mahanadi River. The dam has also led to the loss of biodiversity in the area.