Assertion (A): The performance parameter ‘Polytropic efficiency’ is used for axial flow gas turbines and air compressors.
Reason (R): Polytropic efficiency is dependent on the pressure ratio.
(A) Both A and R are individually true and R is the correct explanation of A
(B) Both A and R are individually true but R is NOT the correct explanation of A
(C) A is true but R is false
(D) A is false but R is true