The correct order of energies of molecular orbitals of N2 molecule, is

1. A. 1s < 1s < 2s < 2s < ( 2p x = 2p y) < 2p z < ( 2p x = 2p y) < 2p z
2. B. 1s < 1s < 2s < 2s < 2p z < ( 2p x = 2p y) < ( 2p x = 2p y) < 2p z
3. C. 1s < 1s < 2s < 2s < 2p z < 2p z < ( 2p x = 2p y) < ( 2p x = 2p y)
4. D. 1s < 1s < 2s < 2s < ( 2p x = 2p y) < ( 2p x = 2p y) < 2p z < 2p z

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