Three separate samples of a solution of a single salt gave these results. One formed a white precipitate with excess ammonia solution, one formed a white precipitate with dil. \[NaCl\] solution and one formed a black precipitate with \[{{H}_{2}}S\]. The salt could be

• A. \[AgN{{O}_{3}}\]
• B. \[Pb{{\left( N{{O}_{3}} \right)}_{2}}\]
• C. \[Hg{{\left( N{{O}_{3}} \right)}_{2}}\]
• D. \[MnS{{O}_{4}}\]