Correct Answer: (d) Kushinagar Airport
Note: Kushinagar Airport in Uttar Pradesh has been granted International status on 24th June, 2020 by Union Cabinet of India. It was at Kushinagar that Gautam Buddha attained the Mahaparinirvana. Kushinagar is also at the centre of a Buddhist tourist circle, which includes Lumbini (Nepal), Sarnath and Bodhgaya,