Geometry

Question Analysis
This question checks conceptual understanding of what definitively classifies a solid as a cone.
The main focus is identifying the essential features of a cone.

Key Concept Explanation
A cone must have:
One flat base (usually circular or elliptical)
A curved lateral surface
An apex (point) where all points of the curve converge
No polygonal base or flat faces like pyramids

Step-by-Step Solution
Option A: Two bases → this describes a cylinder, not a cone ❌
Option B: Apex directly above base center → only for right con...