If for hydrogen $C_P-C_V=m$ and for the nitrogen $C_P-C_V=n$, where $C_P$ and $C_v$ refer to specific heat per unit mass at constant pressure and specific heat per unit mass at constant volume respectively. The relation between $m$ and $n$ is

• Correct answer
  A

  $\mathrm{m}=14\mathrm{n}$
• B

  $\mathrm{n}=7\mathrm{n}$
• C

  $\mathrm{m}=9\mathrm{n}$
• D

  $\mathrm{n}=16\mathrm{n}$

Hence, the correct answer is option: 'A'.