A …………… mirror is made by silvering the …………… surface of a piece of a hollow sphere.
(a) concave, inner
(b) convex, inner
(c) convex, outer
(d) None of the above

(b) convex, inner

Reason — A convex mirror is made by silvering the inner surface of a piece of a hollow sphere such that the reflection takes place from the outer (or bulging) surface.