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

If a mirror is placed on the line MN,

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 shape of the figure in the mirror image.

The circle on the top left side which dark towards left will be on the top right side and dark towards right in the mirror image

The square on the bottom left will be on the bottom right in the mirror image

The arrow symbol on the bottom right will be on the bottom left in the mirror image

The letter S on the top right will be on the top left in the mirror image and the mirror image of S will be as shown in the below figure

Hence, the correct answer is Option A