An inorganic salt in its aqueous solution produced a white ppt with \(NaOH\) which dissolve in excess of \(NaOH.\) . Its aqueous solution produces light yellow ppt with \(AgNO_3\) and sparingly soluble in \(NH_4OH.\) . This salt, probably, is:
1. \(AlBr_3\)
2. \(AlI_3\)
3. \(AlCl_3\)
4. \(ZnCl\)