Molecules of an ideal gas are known to have three translational degrees of freedom and two rotational degrees of freedom . The gas is maintained at a temperature of T. The total internal energy , U of a mole of this gas, and the value of `gamma(= (C_P)/(C_(v)))` are given, respectively , by :

Options

A. `U= 5/2 RT and gamma = 6/5`
B. `U = 5RT and gamma = 7/5`
C. `U = 5/2 RT and gamma = 7/5`
D. `U = 5RT and gamma = 6/5`