The government has granted an extension of one year to Atomic Energy Commission chairman Kamlesh Nilkanth Vyas. Where is the headquarters of the Atomic Energy Commission of India is located?

The correct option is Mumbai.

Here is a step-by-step explanation:
1. Establishment: The Atomic Energy Commission (AEC) of India was established on August 3, 1948, under the Department of Scientific Research. It was created to facilitate the development and utilization of atomic energy for peaceful purposes in the country.
2. Organizational Structure: The AEC serves as the governing body of the Department of Atomic Energy (DAE), which is directly under the administrative control of the Prime Minister of India.
3. Headquarters Location: The headquarters of the Atomic Energy Commission of India is situated in Mumbai, Maharashtra. Mumbai also hosts other key institutions related to India's nuclear program, such as the Bhabha Atomic Research Centre (BARC).
4. Leadership: The Commission is led by a Chairman, who acts as the ex-officio Secretary to the Government of India in the Department of Atomic Energy.