Which of the following ions is the smallest in size?

What is the correct order of radii for $F, F^-, O,$ and $O^{2-}$?

How would you explain the lower atomic radius of $Ga$ as compared to $Al$?

Which of the following is the correct increasing order of ionic radii for $N^{3-}$,$Na^+$,$F^-$,$O^{2-}$,and $Mg^{2+}$?

Which of the following ions has the smallest radius?

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: