A cone is inscribed in a cylinder. A square pyramid is inscribed in a rectangular prism. The cone and the pyramid have the same volume. Part of the volume of the cylinder, V1, is not taken up by the cone. Part of the volume of the rectangular prism, V2, is not taken up by the square pyramid. What is the relationship of these two volumes, V1 and V2?

A- Not enough information is given.

B- V1 is equal to V2

C-V1 is less than V2

D- V1 is greater than V2