Assertion: During an adiabatic process, heat energy is not exchanged between system and its surroundings.
Reason: The temperature of a gas increases when it undergoes an adiabatic expansion.
(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 correct explanation of A
(c) A is true but R is false
(d) A and R are false