There is no shape with 4 faces and 3 vertices
The 3-D shape that has 4 faces is the tetrahedron. All of its faces are triangular, and they all converge at a single vertex.
None. A shape with four faces is a tetrahedron and that has 4 vertices, not 6.
A regular tetrahedron (triangular pyramid).
There is no such shape. The only convex shape that has four faces is a tetrahedron, and that has four vertices, not 5.
A tetrahedron has 4 vertices and 4 faces.