Answer
Please see the work below.
Work Step by Step
We know that the heats of vaporization of $1.8\frac{KJ}{mol}$ for Ne and $6.8$ for $O_2$ increase in the order of their molecular masses of $20.1$ and $32.0$ as only London forces are present there. The heat of vaporization for methanol is higher than that of oxygen as strong hydrogen bonding exist between H and O.
