A ray oflight travelling in the direction $$\frac{1}{2} \left(\widehat{i} + \sqrt 3 \widehat{j}\right)$$ is incident on a plane mirror. After reflection, it travels along the direction $$\frac{1}{2} \left(\widehat{i} - \sqrt 3 \widehat{j}\right)$$. The angle of incidence is

A

$$30^\circ$$

B

$$45^\circ$$

C

$$60^\circ$$

D

$$75^\circ$$