Which one is the correct order of the size of the iodine species?

On moving down a group of representative elements,both atomic and ionic radii increase with an increase in:

The ionic radii of $O^{2-}, F^{-}, Na^{+}$,and $Mg^{2+}$ are in the order :

If the interionic distance between $Na^{+}$ and $F^{-}$ ions is $2.31 \ \mathring{A}$,then the radii of $Na^{+}$ and $F^{-}$ are:

The element expected to form the largest ion to achieve the nearest noble gas configuration is

$A, B, C, D$ and $E$ are elements with atomic numbers $13, 11, 9, 7$ and $16$ respectively. Among these elements,the ion of an element $X$ has the largest size and the ion of an element $Y$ has the smallest size. $X$ and $Y$ are respectively (Assume that all ions have the nearest inert gas configuration).