The correct answer is: 800 MW.
The Koldam Hydro Project is a run-of-the-river hydroelectric power project on the Sutlej River in Himachal Pradesh, India. The project has an installed capacity of 800 MW and is expected to generate 3,600 million units of electricity annually. The project is being developed by the National Hydroelectric Power Corporation (NHPC) and is expected to be completed by 2023.
The project has been facing several challenges, including environmental concerns and opposition from local communities. However, the project is expected to provide significant benefits to the region, including increased electricity generation, employment opportunities, and economic development.
The other options are incorrect because they do not represent the actual capacity of the Koldam Hydro Project.