Geometry

Question Analysis:
This question involves analyzing the base shape and side orientation.
The main focus is on identifying a prism based on its triangular base and right orientation.

Key Concept Explanation:
A prism with triangular bases and rectangular sides that are perpendicular is a right triangular prism.

Step-by-Step Solution:
Base: triangle → triangular prism
Lateral faces: rectangles and perpendicular → right prism

Option Analysis:
A: ✅ Correct
B: ❌ Base is triangle, not hexagon
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