Among the following , the configuration `1s^(2) 2s^(2)2p^(6)3s^(2)3p^(5)4s^(1)`is vilid for the :

Among the following , the configuration `1s^(2) 2s^(2)2p^(6)3s^(2)3p^(5)4s^(1)`is vilid for the :
A. ground state of chorine
B. excited state of clorine
C. excited state of argon
D. excited state of `S^(2-)` ion

Among the following , the configuration `1s^(2) 2s^(2)2p^(6)3s^(2)3p^(5)4s^(1)`is vilid for the :

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