If M is magnetic moment and B is magnetic field, then the torque is given by
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → $\vec M×\vec B$
The torque on a magnetic dipole in a uniform magnetic field is given by:
$\tau = \vec{M} \times \vec{B}$
Magnitude:
$|\tau| = MB \sin\theta$