The magnetic field at a point P on the axis of a short bar magnet of magnetic moment M is B. If another short bar magnet of magnetic moment 2 M is placed on the first magnet such that their axes are perpendicular and their centres coincide. The resultant magnetic field at the point P due to both the magnets is

• A

  3 B
• B

  $\sqrt{3} B$
• Correct answer
  C

  $\sqrt{2} \mathrm{~B}$
• D

  2 B

Hence, the correct answer is option: 'C'.