Assertion (A): in the subsonic range the propulsive efficiency of a rocket less than that of a turbo- jet
Reason (R): The jet velocity of rocket is independent of forward motion.
(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