What happens to the atomic radius of $p$-block elements as we move from left to right across a period in the periodic table?

The smallest among the following ions is

Which of the following represents the correct order of atomic radii?

Which one of the following indicates the correct order of atomic size?

The radius of isoelectronic species:

$A, B, C, D$ 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).