The correct answer is: D. Banka
The Barnar Major Irrigation Project is a major irrigation project in the Banka district of Bihar, India. The project was initiated in 1961 and completed in 1974. The project aims to provide irrigation to about 1.2 lakh hectares of land in the Banka district. The project also provides drinking water to about 10 lakh people in the district.
The project consists of a dam, a canal system, and a power plant. The dam is located on the Barnar River, about 10 km from the town of Banka. The canal system consists of a main canal and a number of branch canals. The power plant is located at the dam site.
The project has been a major success in providing irrigation and drinking water to the people of the Banka district. The project has also helped to improve the agricultural productivity of the district.
The other options are incorrect because:
- Option A: Jamui is a district in Bihar, India. The Barnar Major Irrigation Project is not located in the Jamui district.
- Option B: Gaya is a district in Bihar, India. The Barnar Major Irrigation Project is not located in the Gaya district.
- Option C: Begusarai is a district in Bihar, India. The Barnar Major Irrigation Project is not located in the Begusarai district.