Which of the following electron configurations is correct for nickel?

Q. Which of the following electron configurations is correct for nickel?

A.            [Ar] 4s1 3d8

B.            [Kr] 4s1 4d8

C.            [Kr] 4s1 3d8

D.            [Ar] 4s2 3d8

Answer: [Ar] 4s2 3d8