If a mirror is placed on line PQ in the question figure, then which of the given answer figures is the correct mirror image of the question figure?

When a mirror is placed on the line PQ,

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

The curved part above the line which is open towards right will be open towards left in the mirror image.

The curved part below the line which is open towards left will be open towards right in the mirror image.

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

Hence, the correct answer is Option D