Geometry

Question Analysis:
This question asks you to distinguish between right and oblique prisms.
The main focus is on how the orientation of the sides affects the classification.

Key Concept Explanation:
A right prism has lateral faces that are rectangles (side edges perpendicular to base).
An oblique prism has lateral faces that are parallelograms, with tilted sides.

Step-by-Step Solution:
Base = triangle → must be a triangular prism
Lateral faces = parallelograms → suggests oblique, not right
Therefore, it's an oblique triangular prism

Option Analysis:
A. Right triangular prism ❌ Needs rectangular lateral faces
B. Oblique triangular prism ✅ Correct
C. Triangular pyramid ❌ Only one b...