Which among the following is not true for a plane mirror?
Image is always formed at infinity
Image formed by a plane mirror is always virtual
Image formed is always erect.
Lateral inversion always takes place in a plane mirror
The image is formed at a distance equal to the distance of object and mirror.
A virtual image formed by a concave mirror is always (a) ____ and a virtual image formed by a convex mirror is always (b) _____ .