The magnetic moment has dimensions of

Options

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