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

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

So the arrow pointing towards left will be reversed and will now face towards right, thus the middle two options will be eliminated.

Also, in the question figure, the position of the half diagonal inside the square will be changed and it will appear at left side, hence first option is the right image.

=> Ans - (A)