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Complete removal of both the axial ligands (along the z-axis) from an octahedral complex leads to which of the following splitting patterns? (relative orbital energies not on scale).

1. 2 2 y x d − xy d 2 z d yx , xz d d E
2. 2 2 y x d − xy d 2 z d xz , yz d d E
3. 2 2 y x d − xy d yz , xz d d E 2 z d
4. 2 2 y x d − xy d yz , xz d d E 2 z d

Correct answer: 2 2 y x d − xy d 2 z d yx , xz d d E

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