Explanation:

- Netaji Subhash Chandra Bose International Airport is located in Kolkata. This airport serves as the main aviation hub for the eastern and northeastern parts of India.

- Correct Answer

- Mumbai's primary airport is the Chhatrapati Shivaji Maharaj International Airport. It is one of the busiest airports in India, serving the western region.

- Indira Gandhi International Airport is situated in Delhi. This is another major international airport in India and serves the capital city.

- Chennai International Airport caters to the southern part of India. It is the primary airport for the city of Chennai.