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
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