Directions : In the following questions, a statement of assertion is followed by a statement of ...

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Directions : In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
(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.
Assertion : A heat engine is the reverse of arefrigerator.
Reason : A refrigerator cannot work without some external work done on the system.
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