Assertion (A): Efficiency of a reversible engine operating between temperature limits T1 and T2 is maximum.
Reason (R): Efficiency of a reversible engine is greater than that of an irreversible engine.
a. Both A and R are true and R is the correct explanation of A
b. Both A and R are 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 false