A diminished virtual image can be formed only in
Convex mirror
4. Any ray of light that passes through a convex mirror appears to meet at a point but does not converge in reality and hence a diminished image is formed.
5. The image is formed by the virtual intersection of light and is therefore always virtual.
6. The ray diagram of the convex mirror shown above clearly indicates that the image formed is virtual, upright and diminished.
Hence, option (B) is correct.