In a question figure a 3D object is given. Identify the correct top view of the object amongst the answer figures.
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In the top view the low left wing, the walls of the tower with the slot and the two steps on the right all show as vertical strips, and the slot and the front notch show as one rectangle.
Look straight down on the object (front towards the bottom of the drawing). 1. The low left wing appears as a wide strip on the left. 2. The tower appears with its left wall, the slot and notch (one rectangle open towards the front edge) and its right wall. 3. On the right, the two steps appear as two further strips. This gives a square-like outline divided by vertical lines, with a tall rectangle (slot and notch) in the middle that runs down to the front edge. Options (1) and (2) are front-elevation type drawings with a skyline, and option (3) uses dashed hidden lines, which a top view of the visible surfaces does not need. Option (4) shows the left strip, tower walls, the central rectangle running to the front edge, and the two steps. Answer: (4) the fourth top view
