The diagram depicts light striking a plane mirror. Which row states the angle of reflection and the name of line $PQ$?
- Aangle of reflection $40^\circ$; $PQ$ is the normal
- Bangle of reflection $40^\circ$; $PQ$ is the reflected ray
- Cangle of reflection $50^\circ$; $PQ$ is the normal
- Dangle of reflection $50^\circ$; $PQ$ is the reflected ray