Two plane mirrors AB and CD are placed at right angles to one another. A ray of light PQ hits AB at Q making an angle of \[\text{45 }\!\!{}^\circ\!\!\text{ }\] as shown in the diagram. This ray will be reflected from mirror CD at an angle.

• A. \[\text{20 }\!\!{}^\circ\!\!\text{ }\]                      
• B. \[\text{35 }\!\!{}^\circ\!\!\text{ }\]          
• C. \[\text{45 }\!\!{}^\circ\!\!\text{ }\]                      
• D. \[\text{60 }\!\!{}^\circ\!\!\text{ }\]