At a given temperature,if $V_{rms}$ is the root mean square velocity of the molecules of a gas and $V_s$ is the velocity of sound in it,then these are related as $\left( \gamma = \frac{C_P}{C_v} \right)$:

• A
  $V_{rms} = V_s$
• B
  $V_{rms} = \sqrt{\frac{3}{\gamma}} \times V_s$
• C
  $V_{rms} = \sqrt{\frac{\gamma}{3}} \times V_s$
• D
  $V_{rms} = \left( \frac{3}{\gamma} \right) \times V_s$