Mohan folds a square sheet in half twice, first the left half onto the right and then the top half down, and punches a square hole and a round hole. Which figure shows the sheet fully opened?

Undo the folds in reverse. Opening the top-bottom fold copies both holes into the top half; opening the left-right fold copies all of them to the left. Eight holes, symmetric about both centre lines, with the squares nearest the centre: (d).