Among $[Fe(H_2O)_6]^{3+}$,$[Fe(CN)_6]^{3-}$,$[Fe(C_2O_4)_3]^{3-}$,and $[FeCl_6]^{3-}$,which complex is the most stable?
- A$[Fe(H_2O)_6]^{3+}$
- B$[Fe(CN)_6]^{3-}$
- C$[Fe(C_2O_4)_3]^{3-}$
- D$[FeCl_6]^{3-}$
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