The correct order of magnetic moments (spin only values in B.M) among is

Question

$\begin{array}{1 1}(a)\;MnCl_4^{2-} > COCl_4^{2-} > Fe(CN)_6^{-4}&(b)\;Fe(CN)_6^{-4} > MnCl_4^{2-} > COCl_4^{2-}\\(c)\;Fe(CN)_6^{-4} > COCl_4^{2-} > MnCl_4^{2-}&(d)\;MnCl_4^{2-} > Fe(CN)_6^{-4} > COCl_4^{2-} \end{array}$