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

A horizontal mirror is placed, so the objects will turn upside down in the mirror image (e.g - an object at top right will appear at bottom right). So, the two circular arcs on each corner at the top will appear at the bottom, and thus the second and last options are eliminated.

Also, the top left arcs are enclosed by the pentagon, which will appear at bottom left, thus third option becomes invalid.

=> Ans - (A)