Assertion (A): Though heat is added during a polytrophic expansion process for which $\gamma$ > n > 1, the temperature of the gas decreases during the process.
Reason (R): The work done by the system exceeds the heat added to the system.
a. Both A and R are individually true and R is the correct explanation of A.
b. Both A and R are individually true but R is not the correct explanation of A.
c. A is true but R is false
d. A is false but R is true