Find the image of the point (3, 8) with respect to the line $x +3y = 7$ assuming the line to be a plane mirror

Question

$\begin {array} {1 1} (A)\;(1,4) & \quad (B)\;(-1,-4) \\ (C)\;( \pm 1, \pm 4) & \quad (D)\;\text{ none of the above} \end {array}$