Which of the following electronic configuration represent the element

1.	Which of the following electronic configuration represent the element in ground state?
Answer» `1s^2 2s^1 2p^1` `1s^2 2s^2 2p^1` `1s^2 2s^1 2p_x^1 2p_y^1 2p_z^1` `1s^2 2s^2 2p^6 3s^2 3p_x^1 3p_z^1 3d^1` ANSWER :B

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