Two plane mirrors A and B are aligned parallel to each other as shown. A light ray is incident at an angle of $30^{\circ}$ at a point just inside one end of A. The plane of incidence coincides with place of figure. The maximum number of time the ray undergoes reflections (including the first one ) before it emerges out is

Question

 

$(a)\;28 \\ (b)\;30 \\ (c)\;32 \\ (d)\;34 $