A. 1s² 2s² 2p²
B. 1s² 2s² 2p6
C. 1s² 2s² 2p6 3s² 3p4
D. 1s² 2s² 2p6 3s² 3p6 4s¹

Correct Answer: Option C

C. 1s² 2s² 2p6 3s² 3p4

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