Which of the following statements is correct?

• A
  For $He$,the specific heat capacity at constant volume is $(3/2)R$.
• B
  For a monoatomic gas,the value of $C_p / C_v$ is $5/2$.
• C
  For $H_2$,the rotational energy is zero.
• D
  For $He$,$C_p$ is equal to the $C_p$ of a diatomic gas.