Explanation:

- Trombay is known for the Bhabha Atomic Research Centre, a major nuclear research facility, but not an atomic power plant.

- Kota is home to the Rajasthan Atomic Power Station, important for nuclear energy in India, but not the first.

- Kalpakkam houses the Madras Atomic Power Station (MAPS), where the first indigenously built reactors were commissioned, marking it as the location of India's first indigenous atomic power plant.

- Tarapur is home to the Tarapur Atomic Power Station, India’s first commercial nuclear power station, but not the first indigenously built.