Which of the following is not the correct increasing order of ionisation energy?

The element with the highest value of ionization potential is

Which of the following processes will have the maximum ionization energy?

The element having the greatest difference between its first and second ionization energies is:

The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This is because

The given electronic configurations are for elements $X$,$Y$,and $Z$. Note that these configurations represent ions of the elements:
$X = [Ne] \, 3s^2 \, 3p^5$
$Y = [Ne] \, 3s^2 \, 3p^6$
$Z = [Ne] \, 3s^2 \, 3p^4$
Determine the correct statement regarding the energy changes associated with these configurations.