A bar magnet of magnetic moment M is kept in a uniform magnetic field of strength B, making angle $\mathrm{\theta }$ with its direction. The torque acting on it is

• A

  MB

• B

  $\mathrm{MBcos}\mathrm{\theta }$

• C

  $\mathrm{MB}(1-\cos \mathrm{\theta })$

• D

  $\mathrm{MB} \mathrm{sin\theta }$