Final answer:
The correct electronic configuration of the central atom in K4Fe(CN)6 based on crystal field theory is d6.
Step-by-step explanation:
The correct electronic configuration of the central atom in K4Fe(CN)6 based on crystal field theory is d6. In crystal field theory, the ligands (in this case, CN-) create an electrostatic field around the central metal ion (Fe), which splits the d orbitals into two sets: the lower-energy set (eg) and the higher-energy set (t2g). In the case of Fe2+ in a high-spin state, the electrons will occupy the eg set, resulting in a d6 configuration.