The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with 1 mole each of the complexes C0Cl3. 6NH3, CoCl3. 5NH3, C0Cl3. 4NH3 respectively is
(a) 2AgCl, 3AgCl, 1AgCl
(b) 1AgCl, 3AgCl, 2AgCl
(c) 3AgCl, 1AgCl, 2AgCl
(d) 3AgCl, 2AgCl, 1AgCl