(a) Concave mirror only
(b) Convex mirror only
(c) Convex lens only
(d) Concave mirror, convex mirror, concave lens and convex lens
Answer: (d) Concave mirror, convex mirror, concave lens and convex lens
Explanation: In the case of the placement of concave mirror, convex mirror, concave lens and convex lens, the image of an object placed at infinity will be highly diminished and point sized.