Two magnets of moments `M_1 and M_2` are rigidly fixed together at their centres so that their axes are inclined to each other. This system is suspended in a magnetic field of induction 'B' so that `M_1` makes an angles ` theta _1` and `M_2` makes an angles ` theta_2` with the field direction and unlike poles on either side of the field direction. The resultant torque on the rigid system is

Options

A. A) `B( M_1 sin theta_1 + M_2 sin theta_2)`
B. B) `B (M _1 cos theta _1 +M_2 cos theta_2)`
C. C) `B ( M_1 sin theta_2 +M_2 sin theta_1)`
D. D) `B( M_1 cos theta_2 +M_2 cos theta_1)`