If the time period $(T)$ of vibration of a liquid drop depends on surface tension $(S)$ , radius $(r)$ of the drop and density $(\rho )$ of the liquid, then the expression of $T$ is

• Correct answer
  A

  $T=k\sqrt{\rho r^3/S}$
• B

  $T=k\sqrt{{\rho }^{1/2}{r}^3/S}$
• C

  $T=k\sqrt{\rho r^3/S^{1/2}}$
• D

  None of these

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