Ionization energies of three hypothetical elements are  given below (in kJ/mole)

$\begin{array}{l}\hspace{0.25em} \hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\text{ I }\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em} \text{ II }\hspace{0.25em} \hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\text{ II }\\ \mathrm{X}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}122\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}340\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}1890\\ \mathrm{Y}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}99\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em} 931\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}1100\\ \mathrm{Z}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}118\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}1220\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}1652\end{array}$

Which of the following pairs represents elements could be of the same group?