In the octahedral crystal field,the correct order of splitting for $I^{-}, H_2O, NH_3$ and $CN^{-}$ ligands is:

  • A
    $CN^{-} < NH_3 < H_2O < I^{-}$
  • B
    $NH_3 < H_2O < I^{-} < CN^{-}$
  • C
    $CN^{-} < I^{-} < H_2O < NH_3$
  • D
    $I^{-} < H_2O < NH_3 < CN^{-}$

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