Question

Choose the correct alternative to the following question:

Which of the following figures are not polyhedrons?

• A. cylinder
• B. cone
• C. both (a) and (b)
• D. none of these

Answer 1

The correct option is C

both (a) and (b)

Step $1$: Explanation for the correct option :

Option $\mathrm{C}$ : We know that a solid which is made up of polygonal regions (called faces) is called a polyhedron.

Cylinder and cone are not polyhedrons as their faces are not polygons.

Step $2$: Explanation for incorrect option :

Option $\mathrm{A}$, $\mathrm{B}$, and $\mathrm{D}$ do not give the correct answer.

Hence option $\mathrm{C}$ is the correct option.