Due to the flow of current in a circular loop of radius R, the magnetic induction produced at the centre of the loop is B. The magnetic moment of the loop is (${\mu }_0$ = permeability constant)

• A

  ${\mathrm{BR}}^3/2{\mathrm{\pi \mu }}_0$

• B

  $2{\mathrm{\pi BR}}^3/{\mathrm{\mu }}_0$

• C

  $B{R}^2/2\pi {\mu }_0$

• D

  $2{\mathrm{\pi BR}}^2/{\mathrm{\mu }}_0$