Concept:Real images are formed when light rays actually meet after reflection or refraction.
Explanation:A concave mirror is a converging mirror and can form a real image.
A convex mirror always diverges rays, so it forms only virtual images.
A diverging lens, or concave lens, can form only virtual images.
A converging lens, or convex lens, can converge rays and form a real image.
Therefore, the curved surfaces that can produce a real image are the concave mirror and the converging lens.
Answer:I and
IV only.