The dimensional formula of $\large\frac{1}{2}$$\mu_0H^2(\mu_0$- Permeability of free space and H-magnetic field intensity ) is :

Question

\[\begin {array} {1 1} (a)\;MLT^{-1} & \quad (b)\;ML^{2}T^{-2} \\ (c)\;ML^{-1}T^{-2} & \quad (d)\;ML^2 T^{-1} \end {array}\]