A Circular 20-Turn Coil with a Radius of 10 Cm $\mu$

A circular 20-turn coil with a radius of 10 cm carries a current of 3 A. It lies in the xy plane in a uniform magnetic field = 0.4 T + 0.3 T . The coil rotates so that its magnetic moment, $\mu$ , is aligned with the magnetic field. The potential energy of the system when the coil's magnetic moment is aligned with the field is

A) 0.282 J
B) -0.461 J
C) 0.461 J
D) -0.282 J
E) -0.564 J