Geometry

Question Analysis
This question assesses the student’s ability to correctly identify the defining visual features of a cone among distractors.
The main focus is distinguishing a cone from cylinders, prisms, and pyramids.

Key Concept Explanation
A cone includes:
One circular base
A curved lateral surface
A pointed apex (typically above the center of the base in a right cone)
Other shapes like prisms and pyramids don’t meet all three conditions.

Step-by-Step Solution
Option A: Circular base and curved surface, but flat top → truncated cone, not a cone
Option B: Circular base, curved surface, apex above base → cone ✅