A solid toy is in the shape which is a combination of a cylinder, cone and a hemispherical bowl. The cylinder contributes to 50% of the total volume of the toy, the cone contributes to 20% of the volume. Find the ratio of the contribution (in terms of volume) of the cone, cylinder and hemisphere.

A

2 : 3 : 5

B

5 : 2 : 3

C

2 : 5 : 3

D

4 : 5 : 3