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

When a mirror is placed on the line MN,

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

The triangle which is on the top left will be on the top right in the mirror image.

The circle which is on the bottom right will be on the bottom left in the mirror image.

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

Hence, the correct answer is Option D