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Which of the following electron configurations represents an excited state of the indicated atom?a. Ne: 1s2 2s2 2p6b. N: 1s2 2s2 2p3c. P: 1s2 2s2 2p6 3s2 3p2 4s1d. Na: 1s2 2s2 2p6 3s2 3p2 3s1e. He: 1s2