The correct answer is: C. Subarnarekha
The Indrapuri Barrage is a barrage on the Subarnarekha River in the Indian state of Jharkhand. It is located about 10 km from the town of Jamshedpur. The barrage was constructed in 1957 to provide irrigation and drinking water to the people of the region. It also helps to control floods and generate hydroelectric power.
The Karo River is a tributary of the Subarnarekha River. It flows through the states of Jharkhand and Odisha. The Koel River is a tributary of the Damodar River. It flows through the states of Jharkhand and West Bengal. The Son River is a tributary of the Ganges River. It flows through the states of Madhya Pradesh, Chhattisgarh, Jharkhand, and Bihar.
The Subarnarekha River is the longest river in Jharkhand. It originates in the Chhotanagpur Plateau and flows through the states of Jharkhand, Odisha, and West Bengal. It joins the Brahmani River to form the Mahanadi River. The Subarnarekha River is a major source of irrigation and drinking water for the people of the region. It also helps to control floods and generate hydroelectric power.