Correct option is D
Koldam is a hydroelectric power project located on the Sutlej River in Himachal Pradesh. This project was built by NTPC and plays a significant role in providing renewable energy.
Rammam is another hydroelectric project located on the Rammam River, a tributary of the Teesta River, in West Bengal. It helps to generate clean energy and supports the power grid in the region.
Singrauli is not a hydroelectric power project but a thermal power station. However, it is often associated with both thermal and hydro because of the region's power generation infrastructure.
Jhanor, also known as Jhanor-Gandhar, is a gas-based power project located in Gujarat. It uses natural gas as fuel to generate electricity, which is why it is not considered a hydro-power project. This makes Jhanor the correct answer to the question, as it relies on gas and not hydropower.
