Choose the correct image from the following :

Hint: The image is always formed at the other side of the mirror. Light from the object and each beam is reflected by the mirror according to the law of reflection.

Complete step by step solution:
According to the law of reflection, each beam is reflected by the plane mirror and formed the image at the other side of the mirror.
On the question, diagram is given as :


Ray diagram of object with plane mirror.
So, we can easily see in the above diagram.
Image $A'B'$ & $C'D'$, which is similar to option C.

Hence, option C is correct.

Note: In the plane mirror the image is formed on the other side of mirror and at the same distance which is between object & mirror with $ \bot $ direction of mirror.