The correct option is C Concave mirror
Concave mirrors are used by the doctors for examining eyes, ears, nose and throat. Concave mirrors are used to obtain an enlarged image of these organs. Diverging mirror or convex mirror diverges the light rays falling on it and the image appears diminished, which do not help in close inspection of the organs. Plane mirror obtains the image as same size of the object and hence does not serve the purpose.