Which electron configuration$($s$)$ correspond$($s$)$ to an excited state of a non$-$metallic atom? Check all that apply.

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a $,[Ne]3s^{2}4p^1$

b $,[Ar]4s^{2}3d^{9}4p^5$

c $[Ne]3s^{2}3p^{5}4s^1$

d $[Ar]4s^{2}3d^{10}4p^5$