The correct answer is: B. Sitamarhi
The Bagmati Irrigation Project is a major irrigation project in the Indian state of Bihar. It is located in the Sitamarhi district, on the banks of the Bagmati River. The project was initiated in 1961 and completed in 1972. It has a total installed capacity of 100 MW and irrigates an area of 1,20,000 hectares.
The project consists of a dam, a barrage, and a canal system. The dam is located on the Bagmati River, about 10 km from Sitamarhi town. The barrage is located on the Kamla River, about 20 km from Sitamarhi town. The canal system consists of a main canal and a number of branch canals.
The project provides irrigation to the districts of Sitamarhi, Muzaffarpur, Vaishali, and Darbhanga. It also provides drinking water to the towns of Sitamarhi, Muzaffarpur, and Darbhanga.
The project has had a significant impact on the socio-economic development of the region. It has increased agricultural production, improved the quality of life of the people, and promoted industrial development.
The project has also had some environmental impacts. The dam has caused the submergence of some villages and forests. The canal system has led to the loss of some agricultural land. The project has also affected the flow of the Bagmati River and its tributaries.
Despite these impacts, the Bagmati Irrigation Project is a major development project that has had a positive impact on the socio-economic development of the region.