White substance dissolves in hot water. A black precipitate appears on passing `H_(2)S` gas in its aqueous solution. The black precipitate dissolves in hot `HNO_(3)`. A white precipitate is obtained on adding concentrated `H_(2)SO_(4)` in its solution. This white precipitate is of
A. `BaSO_(4)`
B. `SrSO_(4)`
C. `PbSO_(4)`
D. `CdSO_(4)`
