In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
(A) Exit nozzle, which is a constant volume process
(B) Exit nozzle, which is essentially an isentropic process
(C) Turbine blades, which is a constant volume process
(D) Turbine blades, which is essentially an isentropic process (Ans)