You have not provided the choices, therefore, I cannot give exact answers.However, I will try to help you out with some information.
A cylinder is a three-dimensional geometric solid.
It has the same shape as a soda can.
As for the bases, they have the following properties:
1- the bases have a circular (disc) shape
2- the bases are congruent to each other
3- the bases are parallel to each other
Hope this helps :)