Assertion : A reaction which is spontaneous and accompanied by decrease of randomness must be exothermic. Reason : All exothermic reactions are accompanied by decrease of randomness.

• A. If both assertion and reason are true and reason is the correct explanation of assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of assertion.
• C. If assertion is true but reason is false.
• D. If both assertion and reason are false