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

A vertical mirror is placed, so the object on the left will appear right in reverse position and vice-versa.

So the circle in the top right side will be reversed and will appear at top left, thus the first two options will be eliminated.

Also, in the question figure, the lines inside the triangle are horizontal which will still remain same, although the triangle will appear at right side, hence fourth option is the right image.

=> Ans - (D)