Concept:A concave mirror is a curved reflecting surface that bulges inward and can produce enlarged images of objects placed close to it.
Explanation:Dentists need to see small details inside a patient’s mouth.
When an object is placed between the pole and the focus of a concave mirror, the mirror forms a virtual, erect, and magnified image.
This enlarged image makes cavities, plaque, and tooth damage easier to observe.
Therefore, the dentist uses a concave mirror to inspect teeth.
Plane mirrors give images of the same size, while convex mirrors produce smaller images.
Cylindrical mirrors are not used for tooth inspection.
Answer:Concave mirror (Option C).