An electric dipole with dipole moment $5 \times 10^{-7} \text{ C m}$ is placed in an electric field of $2 \times 10^4 \text{ N C}^{-1}$ at an angle of $60^{\circ}$ with the direction of the electric field. The torque acting on the dipole is:
- A$9 \times 10^{-3} \text{ N m}$
- B$1 \times 10^{-4} \text{ N m}$
- C$8.66 \times 10^{-3} \text{ N m}$
- D$2.88 \times 10^{-3} \text{ N m}$
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