It should be 90 because in question it says that
A cone and a pyramid don't have parallel base, they have a base with a vertice.
A prism and a cylinder have parallel bases. But the bases of a prism are not disc-shape. The bases of a cylinder are.
The answer is a. cylinder
36/2=18
18 would be your answer the radius is half of the diameter
1/2 I guess I don't think you typed in the question correctly. Not trying to be mean.
