Which of the following relation is true for atomic radius?

• A

  $\mathrm{Na}<\mathrm{K}<\mathrm{Cs}<\mathrm{Rb}$

• B

  $\mathrm{Ca}<\mathrm{Mg}<\mathrm{Sr}<\mathrm{Ba}$

• C

  $\mathrm{Al}<\mathrm{Si}<\mathrm{P}<\mathrm{S}$

• D

  $\mathrm{F}<\mathrm{Cl}<\mathrm{Br}<\mathrm{I}$