The correct option is
B right triangular prism
The given 3-D contains two parallel and congruent triangular faces and three rectangular faces perpendicular to the triangular ones.This is a polyhedron which has 6 vertices, 9 edges, and 5 faces.
All the properties of the above 3-D matches with the properties of right triangular prism.
Hence, the given 3-D object is right triangular prism.