Mensuration

Ramesh has three containers.
(a) Cylindrical container A having radius r and height h,
(b) Cylindrical container B having radius 2r and height 1/2 h, and
(c) Cuboidal container C having dimensions r × r × h
The arrangement of the containers in the increasing order of their
volumes is
(a) A, B, C
(b) B, C, A
(c) C, A, B
(d) cannot be arranged