A short bar magnet with its north pole facing north forms a neutral point at P in the horizontal plane. If the magnet is rotated by 90o in the horizontal plane, the net magnetic induction at P is (Horizontal component of earth?s magnetic field = \[{{B}_{H}}\]) [EAMCET (Engg.) 2000]

• A.            0    
• B.            2 BH 
• C.            \[\frac{\sqrt{5}}{2}{{B}_{H}}\]                                          
• D.            \[\sqrt{5}\,{{B}_{H}}\]