(A) : Sound would travel faster on a hot summer day than on a cold winter day.
(R) : Velocity of sound is directly proportional to the square of its absolute temperature.

(A) is true but (R) is false

Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false