If a mirror is placed on the line MN, then which of the answer figures is the right image of the given figure?

When the mirror is placed on the line MN,

The facing of the figure to the top and bottom direction changes to the opposite direction in the mirror image(top facing changes to bottom and vice versa). There won't be change in left and right direction.

The semicircle which is towards top left corner of the square will be towards bottom left corner.

$$\therefore\ $$The mirror image of the given figure is

Hence, the correct answer is Option C