Assertion (A): Large reaction turbines have higher overall efficiency than the small reaction turbines.
Reason (R): The mechanical efficiency of small reaction turbines is higher than that of larger ones.
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