Choose the correct top view of the given 3D image from the options.
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Build the top view layer by layer: slab outline with one chamfered corner, then the middle block (a short straight edge followed by a diagonal), the top wedge triangle and the plain ramp.
Seen from above, each level of the object leaves its outline in the plan. Base slab: a rectangle with one corner cut off by a slanting (chamfer) edge, as at the bottom right of the options. Middle block: its outline starts with a short straight edge (the left face seen edge-on) and then turns into a slanting edge (the front face at an angle), ending at the vertical line where the ramp begins. Top block: it is a wedge with a triangular top, so it shows up as a triangle along the upper left, with a slanting side. Ramp: it is a single inclined plane, so from above it is a plain rectangle bounded by the vertical line where it starts and has no line inside it. Option 1 has no short straight edge for the middle block (its slanting line runs straight from the left edge), so it is wrong. Options 2 and 4 draw an extra vertical line across the ramp rectangle, which the object does not have. Option 3 has the chamfered slab, the short straight edge followed by the slanting edge, the triangle for the top block, the vertical start line of the ramp and a plain ramp rectangle, so it is the correct top view. Answer: (3) Option 3
