Assertion : The enthalpy of formation of gaseous oxygen molecules at 298, K and under a pressure of one bar is zero.
Reason : The entropy of formation of gaseous oxygen molecule under the same conditions is zero.

Options

A. A and (R) are correct and (R) is the correct explanation of(A).
B. 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

Entropy of formation of even elementary substances at 298 K and one bar is not zero.