Which of the following sets of atomic number belong to that of alkali metals?

Q. Which of the following sets of atomic number belong to that of alkali metals?

A.            1, 12, 30, 4, 62

B.            37, 19, 3, 55

C.            9, 17, 35, 53

D.            12, 20, 56, 88

Answer: 37, 19, 3, 55