A rectangular coil of length $0.12 \mathrm{~m}$ and width $0.1 \mathrm{~m}$ having 50 turns of wire is suspended vertically in a uniform magnetic field of strength $0.2$ Weber $/ \mathrm{m}^{2}$. The coil carries a current of $2 \mathrm{~A}$. if the plane of the coil is inclined at an angle of $30^{\circ}$ with the direction of the field, the torque required to keep coil in stable equilibrium will be: (1) $0.12 \mathrm{Nm}$ (2) $0.15 \mathrm{Nm}$ (3) $0.20 \mathrm{Nm}$ (4) $0.24 \mathrm{Nm}$.