Which of the following represents the electron configuration of a selenium ion in its common oxidation state?
A) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
B) 1s2 2s2 2p6 3s2 3p6 4s2 3d10
C) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
D) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2
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