The specific heat of diatomic gas at constant pressure is given by (R = universal gas constant and M = molecular weight of gas)

A

$$\frac{5}{2} \frac{R}{M}$$

B

$$\frac{5}{2} MR$$

C

$$\frac{7}{2} \frac{R}{M}$$

D

$$\frac{7}{2} MR$$