The correct answer is: B. Bhabour Sahib Project
The Bhabour Sahib Project is the biggest irrigation project in Himachal Pradesh. It is a multipurpose project that was completed in 1974. The project provides irrigation to over 100,000 hectares of land in the districts of Kangra, Hamirpur, and Una. It also generates 100 MW of hydroelectric power.
The project consists of a dam, a reservoir, a power plant, and a canal system. The dam is located on the Bhabour River, about 100 km from Dharamshala. The reservoir has a capacity of 1.2 billion cubic meters. The power plant has an installed capacity of 100 MW. The canal system irrigates over 100,000 hectares of land in the districts of Kangra, Hamirpur, and Una.
The Bhabour Sahib Project is a major source of irrigation and hydroelectric power in Himachal Pradesh. It has also helped to improve the socio-economic conditions of the people living in the project area.
The other options are incorrect because they are not as big as the Bhabour Sahib Project.
- Balh Valley Project is a small irrigation project that was completed in 1964. It provides irrigation to about 10,000 hectares of land in the district of Chamba.
- Shahnehar Project is a small irrigation project that was completed in 1972. It provides irrigation to about 5,000 hectares of land in the district of Bilaspur.
- Siddhartha Project is a small irrigation project that was completed in 1980. It provides irrigation to about 2,000 hectares of land in the district of Kangra.