50 mL of 0.2 M solution of a compound with empirical formula \[CoC{{l}_{3}}.4N{{H}_{3}}\] on treatment with excess of \[AgN{{O}_{3}}(aq)\] yields 1.435g of\[AgCl\] Ammonia is not removed by treatment with concentrated \[{{H}_{2}}S{{O}_{4}}\]. The formula of the compound is:

• A. \[\left[ Co{{\left( N{{H}_{3}} \right)}_{4}} \right]C{{l}_{3}}\]
• B. \[\left[ Co\left( N{{H}_{3}} \right)4C{{l}_{2}} \right]Cl\]
• C. \[\left[ Co{{\left( N{{H}_{3}} \right)}_{4}} \right]C{{l}_{3}}\]
• D. \[\left[ CoC{{l}_{3}}\left( N{{H}_{3}} \right) \right]{{\left( N{{H}_{3}} \right)}_{3}}\]