The correct option is C virtual, behind the mirror and of the same size as the object
Answer is B.
The image formed by a plane mirror is always virtual (meaning that the light rays do not actually come from the image), upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come.
To summarize, the image formed by plane mirrors are,
1. Virtual
2. Behind the mirror
3. Erect (means not inverted)
4. Same size as the object
5. At same distance from the mirror as the object is from the mirror.