Step 1: Interpreting the plan view.
The plan view (Figure A) shows a square base with a smaller square centered on top and sloping edges connecting them, forming an inward pyramidal shape. This indicates a structure where the top portion is smaller and aligned at the center of a larger base.
Step 2: Matching with the given objects.
- Object 1: Flat top—does not match.
- Object 2: Has a centered element but the top is cylindrical, not square—does not match.
- Object 3: Has an inverted cone/pyramid on top—this would create a different plan view (a small square *on top of a larger one* but edges taper *outwards*, not matching the inward slopes seen).
- Object 4: Has a small square top, centered, with sloping sides down to a larger square base—this exactly produces the plan view in A.
Step 3: Conclusion.
Thus, the correct object whose plan view is shown is Option (D) 4.