A magnetic dipole in a constant magnetic field has :

Question

$\begin{array}{1 1}\text{(1) maximum potential energy when the torque is maximum.} \\ \text{(2) zero potential energy when the torque is minimum.} \\ \text{(3) zero potential energy when the torque is maximum.} \\ \text{(4) minimum potential energy when the torque is maximum.} \end{array}$