$H_2 S$ gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because-

Question

( A ) Presence of HCl decreases the sulphide ion concentration.
( B ) Sulphides of group IV cations are unstable in HCl
( C ) Solubility product of group II sulphides is more than that of group IV sulphides
( D ) Presence of HCl increases the sulphides ion concentration