Explanation:

Silchar, a city in Assam, does not have a nuclear power plant. The other options are locations of operational nuclear power plants in India. Option A, Narora, is home to the Narora Atomic Power Station in Uttar Pradesh. Option B, Rawatbhata, hosts the Rajasthan Atomic Power Station. Option D, Tarapore, in Maharashtra, has the Tarapur Atomic Power Station, which was India's first commercial nuclear power station. Therefore, Silchar is the only location listed that does not have a nuclear power plant, making it the correct answer.