Identify the coordination complexes in which the central metal ion has \( d^4 \) configuration.
(A) \( \mathrm{[FeO_4]^{2-}} \)
(B) \( \mathrm{[Mn(CN)_6]^{3-}} \)
(C) \( \mathrm{[Fe(CN)_6]^{3-}} \)
(D) \( \text{Cr}_2(\text{O}-\overset{\overset{\text{O}}{\parallel}}{\text{C}}-\text{Me})_4(\text{H}_2\text{O})_2\)
(E) \( \mathrm{[NiF_6]^{2-}} \)
Choose the correct answer from the options given below:
