Which one of the following complexes will consume more equivalents of aqueous solution of $Ag(NO_3)$ ?

Question

$\begin{array}{1 1}(1) Na_3[CrCl_6] \\ (2) [Cr(H_2O)_5Cl]Cl_2 \\ (3)[Cr(H_2O)_6] Cl_3 \\ (4)Na_2[CrCl_5(H_2O)] \end{array} $