A sheet of paper is folded along the dotted line successively along the directions shown and is then punched in the last. How would the paper look when unfolded?

The correct unfolded paper pattern is represented by:


Step-by-Step Explanation:

1. Understanding the Folding Process:
As shown in the question diagram:
A square sheet of paper is folded along the horizontal dotted line by moving the bottom half upwards over the top half.

2. Analyzing the Cutouts:
On the folded upper section, three punches/cutouts are made:
- A left triangle pointing towards the right.
- A central vertical rectangle.
- A right triangle pointing towards the left.

3. Mirror Image upon Unfolding:
When the paper is unfolded downwards along the horizontal fold line, all shapes on the upper half reflect symmetrically across the horizontal midline onto the lower half:
- The upper-left triangle reflects vertically to create an identical lower-left triangle pointing to the right.
- The upper-right triangle reflects vertically to create an identical lower-right triangle pointing to the left.
- The central vertical rectangle reflects vertically to form a second vertical rectangle directly beneath it in the lower half.

4. Conclusion:
The fully unfolded sheet contains two central vertical rectangles aligned vertically and four triangles pointing inwards near the side edges. This matches the second option image perfectly.