Geometry

Question Analysis
This question involves interpreting a described diagram of a cone.
The main focus is on identifying cone type based on the position of the apex and the shape of the base.

Key Concept Explanation
A right circular cone has:
A circular base
The apex directly above the base center
These properties match the description in the diagram.

Step-by-Step Solution
Option A: Incorrect. An oblique cone has a slanted axis, not one forming a right angle.
Option B: Incorrect. The base is circular, not elliptical.
Option C: Correct. The apex is above the center — this is a right circular cone.