The correct answer is: b) Subansiri Lower Dam.
The Subansiri Lower Dam is a hydroelectric dam under construction on the Subansiri River in Arunachal Pradesh, India. The dam is being built by the National Hydroelectric Power Corporation (NHPC) and is expected to be completed in 2023. The dam will have a installed capacity of 2,000 MW and will generate 9,000 million units of electricity per year.
The Tipaimukh Dam is a hydroelectric dam on the Barak River in Manipur, India. The dam is being built by the North Eastern Electric Power Corporation (NEEPCO) and is expected to be completed in 2023. The dam will have a installed capacity of 1,500 MW and will generate 6,000 million units of electricity per year.
The Kopili Dam is a hydroelectric dam on the Kopili River in Meghalaya, India. The dam was built by the Damodar Valley Corporation (DVC) and was completed in 1970. The dam has an installed capacity of 250 MW and generates 1,000 million units of electricity per year.
The Ranganadi Dam is a hydroelectric dam on the Ranganadi River in Arunachal Pradesh, India. The dam was built by the NHPC and was completed in 1985. The dam has an installed capacity of 600 MW and generates 2,400 million units of electricity per year.