The dimensional formula of latent heat is :

Options

1. A$\left[\mathrm{ML}^2 \mathrm{~T}^{-2}\right]$
2. B$\left[\mathrm{M}^0 \mathrm{~L}^2 \mathrm{~T}^{-2}\right]$
3. C$\left[\mathrm{MLT}^{-2}\right]$
4. D$\left[\mathrm{M}^{\circ} \mathrm{LT}^{-2}\right]$