Geometry

Question Analysis
This question focuses on choosing a correct cone from several common 3D solids described in visual terms.
The main focus is to eliminate non-cone shapes based on base and surface type.

Key Concept Explanation
A cone has:
A single circular base
A curved lateral surface
A pointed apex
Each incorrect option lacks at least one of these properties.

Step-by-Step Solution
Option A: Circular base and top, straight sides → cylinder
Option B: Triangular base and flat faces → triangular pyramid
Option C: Circular base + curved su...