Geometry

Question Analysis:
This question involves identifying types of 3-dimensional geometric solids.
The main focus is on distinguishing prisms from other 3D shapes based on their defining characteristics.

Key Concept Explanation:
A prism is a three-dimensional solid with two parallel and congruent polygonal bases, and other faces (called lateral faces) that are parallelograms. The name of a prism is based on the shape of its base:
Triangular Prism → base is a triangle
Rectangular Prism → base is a rectangle
Pentagonal Prism → base is a pentagon
A cylinder, though it has two circular bases, is not a prism because a circle is not a polygon, and the lateral surface is curved, not flat.

Step-by-Step Solution:
Recall the definition of a prism: it must have two polygonal bases and flat parallelogram sides.
Review each option:
A) Triangular Prism – valid: base is a triangle
B) Rectangular Prism – valid: base is a rectangle
C) Pentagonal Prism – valid: base is a ...