Dimensional formula of velocity of sound is

• A.             \[{{M}^{0}}L{{T}^{-2}}\]          
• B.             \[L{{T}^{0}}\]
• C.             \[{{M}^{0}}L{{T}^{-1}}\]
• D.             \[{{M}^{0}}{{L}^{-1}}{{T}^{-1}}\]