The correct order of first ionization potential among following elements, Be, B, C, N and O is

Q. The correct order of first ionization potential among following elements, Be, B, C, N and O is

A.            B < Be < C < O < N

B.            B < Be < C < N < O

C.            Be < B < C < N < O

D.            Be < B < C < O < N

Answer: B < Be < C < O < N

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