Which of the following can be used to form a real image

Which of the following can be used to form a real image?

  1. Concave mirror only
  2. Plane mirror only
  3. Convex mirror only
  4. Both concave and convex mirrors

Answer

Only a concave mirror can form a real image. Plane mirror and convex mirror always form a virtual image of an object.

The correct option is A.