Assertion : Decrease in free energy causes spontaneous reaction.
Reason : Spontaneous reactions are invariably exothermic.

Options

A. A and (R) are correct and (R) is the correct explanation of(A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of(A).
C. If(A) is correct, but (R) is incorrect.
D. If both (A) and (R) are incorrect.

Answer

C

Explanation

Spontaneous reaction may be negative also.