HCl was passed through a solution of `CaCl_(2)`, `MgCl_(2)` and NaCl which of the following compound(s) crystallises?
(A) Only `MgCl_(2)`
(B) NaCl,`MgCl_(2)` and `CaCl_(2)`]
(C) Both `MgCl_(2)` and `CaCl_(2)`
(D) Only NaCl