Correct Answer: (4) Durgapur, West Bengal
Solution:India’s first private Greenfield airport project at Durgapur in West Bengal, on 18 May 2015, commenced commercial air operations. Christened Kazi Nazrul Islam Airport (KNIA), the airfield has been developed by Bengal Aerotropolis Pvt. Ltd. (BAPL) with the technical expertise from Singapore based Changi Airports International.