In a construction site a lifting machine on the ground is used to lift bricks to the 8^(th) floor which is 25m high. At a time the machine can lift a 2000kg load is 1min.The power satellite to the engine of the lift is 15HP.what is the efficiency of the lifting machine?[P-1.5, IUT : 2021-22]

A 87%

B 73%

C 80%