The correct answer is c) Idamalayar Dam.
The Idamalayar Dam is a masonry dam on the Idamalayar River, a tributary of the Periyar, in the Idukki district of Kerala, India. It is located about 100 km from the state capital, Thiruvananthapuram. The dam was constructed between 1970 and 1974 and is operated by the Kerala State Electricity Board.
The dam is 136 m high and 375 m long. It has a gross storage capacity of 300 million cubic meters and a live storage capacity of 240 million cubic meters. The dam is used for irrigation, drinking water supply, and hydroelectric power generation.
The Idamalayar Dam is a major tourist attraction in Kerala. The dam offers stunning views of the surrounding hills and forests. There are also several picnic spots and trekking trails near the dam.
The other options are incorrect because:
- Option a) Idukki Dam is located on the Idukki River, a tributary of the Pamba.
- Option b) Malampuzha Dam is located on the Malampuzha River, a tributary of the Bharathappuzha.
- Option d) Neyyar Dam is located on the Neyyar River, a tributary of the Karamana River.