Compounds in which $H$ is directly linked with $N$ or $O$ or $F$, have a capability of forming $H$ -bonds which result in increased boiling point.
Among the given, only $CH _{3} OH$ and $CH _{3} NH _{2}$ are able to form $H$-bonds but $H$-bonding in $CH _{3} OH$ due to high electronegativity of $O$-atom, is strong. Hence, $CH _{3} OH$ has the highest boiling point.