A triangular loop of side l carries a current I. It is placed in a magnetic field B such that the plane of the loop is in the direction of B. The torque on the loop is [MP PET 2003]

• A.            Zero                                         
• B.            IBl
• C.            \[\frac{\sqrt{3}}{2}I{{l}^{2}}{{B}^{2}}\]                         
• D.            \[\frac{\sqrt{3}}{4}IB{{l}^{2}}\]