(a) the number of operational and non-operational airports in the country under the Airports Authority of India (AAI), State/UT-wise;
(b) whether the Government/AAI has spent a large amount on the maintenance of non-operational airports during the last three years and the current year;
(c) if so, the details thereof, State/UTwise;and
(d) the steps taken by the Government/AAI for revival of non-operational airports?