Assertion: The temperature of a gas does not change, when it undergoes an adiabatic expansion.

• A. Reason: During an adiabatic process, heat energy is exchanged between a system and its surrounding.
• B. Both assertion and reason are true and the reason is the correct explanation of the assertion
• C. Both assertion and reason are true but the reason is not a correct explanation of the assertion
• D. Assertion is true but the reason is false
• E. Both assertion and reason are false