Geometry

Question Analysis:
This question requires identifying which described 3D solids meet the definition of a prism.
The main focus is distinguishing between prisms, pyramids, and cylinders, using verbal descriptions.

Key Concept Explanation:
A prism:
Has two parallel, congruent polygonal bases
Has flat, parallelogram-shaped lateral faces
May be right or oblique
Other solids:
Pyramids: one base, sides meet at a point
Cylinders: circular bases, curved side

Step-by-Step Solution:
A: Triangular bases + 3 parallelogram sides → ✅ Triangular prism
B: 1 base + 4 triangles to a point → ❌ Square pyramid
C: Hexagonal bases + 6 parallelogram sides, slanted → ✅ Oblique hexagonal prism
D: Circular bases + curved surface → ❌ Cylinder