A bar magnet having a magnetic moment of \[2\times {{10}^{4}}J{{T}^{-1}}\] is free to rotate in a horizontal plane. A horizontal magnetic field \[B=6\times {{10}^{-4}}T\] exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction \[60{}^\circ \] from the field is

• A. 12 J     
• B. 6 J
• C. 2 J       
• D. 0.6 J