Assertion (A): While transmitting power between two parallel shafts the noise generated by a pair of helical gears is less than that of an equivalent pair of spur gears
Reason (R): A pair of helical gears has fewer teeth in contact as compared to an equivalent pair of spur gears.
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
(c) A is true but R is false
(d) A is false but R is true