The adiabatic elasticity of hydrogen gas $(\mathrm{\gamma }=1.4)$ at NTP is

• A

  $1\times {10}^5\mathrm{N}/{\mathrm{m}}^2$

• B

  $1\times {10}^{-8}\mathrm{N}/{\mathrm{m}}^2$

• C

  $1.4\mathrm{N}/{\mathrm{m}}^2$

• D

  $1.4\times {10}^5\mathrm{N}/{\mathrm{m}}^2$