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Which one among the following statements is true?

A)  A cylinder, A hemisphere and a cone stand on equal and the same height. The ratio of their volumes is 3 : 1 : 2 respectively.

B)   If a sphere is inscribed in a cube, then the ratio of the volume of the sphere to the volume of cube is 6 : n.

C)  If the radius of a cylinder is tripled and height is doubled then, the volume will be 18 times of the previous.

D)  All the above

E)  None of these