The correct answer is: a) The Nilgiris.
The Kundah Hydroelectric Project is a significant power station located in the Nilgiris district of Tamil Nadu, India. The project was commissioned in 1925 and has a total installed capacity of 120 MW. The project consists of four dams, three power stations, and a 100 km long tunnel. The dams are located on the Kundah River, which is a tributary of the Kaveri River. The power stations are located at Kundah, Pykara, and Mettur. The tunnel connects the dams to the power stations.
The Kundah Hydroelectric Project is an important source of electricity for Tamil Nadu. The project also provides water for irrigation and drinking water. The project has had a significant impact on the environment of the Nilgiris district. The dams have caused the flooding of some areas and the displacement of people. The project has also affected the flow of the Kundah River and the ecology of the area.
The Palani Hills, Anamalai Hills, and Kolli Hills are all located in Tamil Nadu. However, the Kundah Hydroelectric Project is not located in any of these hills.