Atomic numbers of four elements are as follows : F(9), P(15), Cl(17), Ar(18). Which of the following two elements would be chemically similar?

Atomic numbers of four elements are as follows : F(9), P(15), Cl(17),

1.	Atomic numbers of four elements are as follows : F(9), P(15), Cl(17), Ar(18). Which of the following two elements would be chemically similar?
A.	F and Ar
B.	Cl and P
C.	F and P
D.	F and Cl
Answer» E.