Which of the following relation is true for atomic radius?

• A

  $\mathrm{Na}>\mathrm{K}>\mathrm{Rb}>\mathrm{S}$

• B

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

• C

  Al > Si > P > S

• D

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