Which one of the following ions has the highest value of ionic radius?

For isoelectronic species (${\text{F}}^{-}$, ${\text{O}}^{2-}$, ${\text{Li}}^{+}$, ${\text{B}}^{3+}$), the ionic radius increases with a decrease in nuclear charge (atomic number).${\text{O}}^{2-}$ and ${\text{F}}^{-}$ both have $10$ electrons.${\text{O}}^{2-}$ ($Z=8$) has a smaller nuclear charge than ${\text{F}}^{-}$ ($Z=9$), making it the largest among them.${\text{Li}}^{+}$ and ${\text{B}}^{3+}$ have fewer shells/electrons.