Kundanulam Nuclear Power plant is being established in

Tamil Nadu
Kerala
Andhra Pradesh
Karnataka

The correct answer is (a) Tamil Nadu.

The Kundanulam Nuclear Power Plant is a proposed nuclear power plant in Tamil Nadu, India. It is being built by the Nuclear Power Corporation of India Limited (NPCIL) and is expected to have two 1,000-megawatt reactors. The plant is located on the coast of the Bay of Bengal, about 100 kilometers from Chennai.

The plant has been controversial since its inception, with environmental groups and local residents opposing its construction. The plant has also been the target of several protests and demonstrations.

Despite the opposition, the plant is currently under construction and is expected to be operational by 2020.

The other options are incorrect because:

(b) Kerala is a state in southern India. It is not located on the coast of the Bay of Bengal.

(c) Andhra Pradesh is a state in southern India. It is not located on the coast of the Bay of Bengal.

(d) Karnataka is a state in southern India. It is not located on the coast of the Bay of Bengal.