The size of the isoelectronic species $Cl^{-}$,$Ar$,and $Ca^{2+}$ is affected by

Given below are two statements:
Statement $I$: The metallic radius of $Na$ is $1.86 \ \mathring{A}$ and the ionic radius of $Na^{+}$ is lesser than $1.86 \ \mathring{A}$.
Statement $II$: Ions are always smaller in size than the corresponding elements.
In the light of the above statements,choose the correct answer from the options given below:

Which of the following orders is correct?

The correct order of radii is

Which of the following has the smallest size?

Arrange the elements $S, O, Na,$ and $Li$ in the decreasing order of their atomic radii.