Correct statement is

1.	Correct statement is
Answer» `K=4s^1 , Cr=3d^4 4s^2 , Cu=3d^10 4s^2` `K=4s^2 , Cr=3d^4 4s^2 , Cu=3d^10 4s^2` `K=4s^2 , Cr=3d^5 4s^1 , Cu=3d^10 4s^2` `K=4s^1 , Cr=3d^5 4s^1 , Cu=3d^10 4s^1` ANSWER :D

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