The best description of the relationship between the incident ray, the reflected ray, and the normal for a curved mirror is:
The angle that the incident ray makes with the normal is the same as the angle that the reflected ray makes with the normal. Different points on a curved mirror have a different normal.
This statement accurately reflects the law of reflection, which states that the angle of incidence (the angle between the incident ray and the normal) is equal to the angle of reflection (the angle between the reflected ray and the normal). Since a curved mirror has a varying curvature, the normal will be different at different points on the mirror.