In which of the following options, the elements are correctly arranged with respect to their negative electron gain enthalpies?

In group 13 of the long form of periodic table an element $X$ has a boiling point of $T_2(\mathrm{~K})$ and melting point of $T_1(\mathrm{~K})$. Identify the element $X$ for which $T_2-T_1(\mathrm{~K})$ is maximum