The image formed by concave mirror is real, inverted and of the same size as that of the object. The position of the object should be

Correct answer: (b) at the centre of curvature

Explanation

For a concave mirror, when the object is at the centre of curvature (C), the image forms at C itself.

This image is real, inverted and of the same size as the object (magnification = 1).

Other positions give magnified, diminished or virtual images, not equal-sized.