Take a square piece of paper as shown in figure (1). Fold it along its diagonals as shown in figure (2). Again fold it as shown in figure (3). Imagine that you have cut off 3 pieces of the form of congruent isosceles right-angled triangles out of it as shown in figure 4.
On opening the piece of paper which of the following shapes will you get?
As per the steps given in the question, if we open the piece of paper then we will get a figure as shown in option A.
So the correct answer is A.