A coil in the shape of an equilateral triangle of side $$0.02 \mathrm{~m}$$ is suspended from its vertex such that it is hanging in a vertical plane between the pole pieces of permanent magnet producing a uniform field of $$5 \times 10^{-2} \mathrm{~T}$$. If a current of $$0.1 \mathrm{~A}$$ is passed through the coil, what is the couple acting?
(a) $$5 \sqrt{3} \times 10^{-7} \mathrm{Nm} \quad$$ (b) $$5 \sqrt{3} \times 10^{-10} \mathrm{Nm}$$
(c) $$\frac{\sqrt{3}}{5} \times 10^{-7} \mathrm{Nm}$$