The correct order of reactivity of $\mathrm{CH}_3 \mathrm{Br}$ in methanol with the following nucleo

Question

The correct order of reactivity of $\mathrm{CH}_3 \mathrm{Br}$ in methanol with the following nucleophiles is 
$\mathrm{F}^{-}, \mathrm{I}^{-}, \mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{-}$and $\mathrm{C}_6 \mathrm{H}_5 \mathrm{O}^{-}$

Professor PC Thomas Classes · Answer

See detailed solution for explanation.