$CH_3OH$ has the highest boiling point.
Work Step by Step
The dispersion forces are similar in all three compounds because they all have nearly similar molar masses. However, in $CH_3OH$, a $H$ is directly bonded to $O$, so it has hydrogen bonding. Hydrogen bonding is the strongest inter-molecular force, and it takes a lot of energy to break. So, $CH_3OH$ has the highest boiling point.