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 holds that the angle of incidence equals the angle of reflection, and it acknowledges that, since a curved mirror has varying curvature, the normal (which is perpendicular to the surface at the point of incidence) differs at different points on the mirror's surface.