Which of the following is a regular polyhedron?

Option (a) cuboid is not a regular polyhedron because its vertices are not formed by the same number of faces.

(b) Triangular prism is not a regular polyhedron which has two triangular face and three rectangular sides. so, vertices are not formed by the same number of faces.

(c) cube is a regular polyhedron because its vertices are formed by the same number of faces.

(d) Square prism is not a regular polyhedron because its vertices are not formed by the same number of faces.