The solubility product of CuS, `Ag_(2)S`, HgS are `10^(-31), 10^(-44), 10^(54)` respectively. The solubilities of these sulphides are in the order
A. `Ag_(2)S gt CuS gt HgS`
B. `Ag_(2)S gt HgS gt CuS`
C. `HgS gt Ag_(2)S gt CuS`
D. `CuS gt Ag_(2)S gt HgS`