Which of the following are prisms among the following?
Unsharpened pencil
A box
Both B and C
A prism is a polyhedron with uniform cross-section and two congruent polygonal bases parallel to each other.
Usually, an unsharpened pencil has two hexagonal bases and six lateral faces.
A rectangular box has two rectangular ends and four lateral faces.
A table calendar has two triangular bases and three lateral faces.
Therefore, an unsharpened pencil, rectangular box, and a table calendar are examples of prism.