Which one of the following represents the correct dimensions

$\left[\mathrm{ML}^{-1} \mathrm{~T}^{-2}\right]$

$\left[\mathrm{MLT}^{-1}\right]$

$\left[\mathrm{ML}^{-1} \mathrm{~T}^{-1}\right]$

$\left[\mathrm{ML}^{-2} \mathrm{~T}^{-2}\right]$