The correct order of the stoichiometries of $\require{mhchem}\ce{AgCl}$ formed when $\ce{AgNO3}$ in excess is treated with the complexes : $\ce{CoCl3.6NH3,\ CoCl3.5NH3,\ CoCl3.4NH3}$ respectively is
(a) $\ce{3AgCl,\ 1AgCl,\ 2AgCl}$
(b) $\ce{3AgCl,\ 2AgCl,\ 1AgCl}$
(c) $\ce{2AgCl,\ 3AgCl,\ 2AgCl}$
(d) $\ce{1AgCl,\ 3AgCl,\ 2AgCl}$
(a) $\ce{3AgCl,\ 1AgCl,\ 2AgCl}$
(b) $\ce{3AgCl,\ 2AgCl,\ 1AgCl}$
(c) $\ce{2AgCl,\ 3AgCl,\ 2AgCl}$
(d) $\ce{1AgCl,\ 3AgCl,\ 2AgCl}$