Which of the following ions is the most stable?

  • A
    $[Fe(Cl)_6]^{3-}$
  • B
    $[Fe(H_2O)_6]^{3+}$
  • C
    $[Fe(CN)_6]^{4-}$
  • D
    $[Fe(NH_3)_6]^{3+}$

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