Which among the following countries is providing Pilatus trainer aircraft to Indian Air Force (IAF)?
[B]United States

Recently, the first of the 75 Swiss Pilatus trainer aircraft procured by the IAF under a Rs 2,800 crore deal to train its rookie pilots are landed at Jamnagar in Gujarat. The fleet of 75 aircraft will help in replacing the fleet of HPT-32 basic trainers which were grounded after a fatal crash in 2009. The Pilatus plane flew in from the firm’s headquarters in Stans in Switzerland for its maiden flight.