The order of ionisation potential between $He^{+}$ ion and $H$ atom (both species are in gaseous state) is

The first three ionisation energies (in $kJ/mol$) of three representative elements are given below:

Element	$IE_1$	$IE_2$	$IE_3$
$P$	$495.8$	$4562$	$6910$
$Q$	$737.7$	$1451$	$7733$
$R$	$577.5$	$1817$	$2745$

Which of the following options is incorrect?

The sum of $IE_1 + IE_2$ and $IE_3 + IE_4$ for elements $P$ and $Q$ are given below:

Element	$IE_1 + IE_2$ $(kJ/mol)$	$IE_3 + IE_4$ $(kJ/mol)$
$P$	$2.45$	$8.82$
$Q$	$2.85$	$6.11$

Then,according to the given information,the incorrect statement$(s)$ is/are:

Which one of the following elements has the highest ionisation energy?

Given below are two statements:
Statement $(I)$: The first ionisation enthalpy of the elements $Na$,$Mg$,$Cl$ and $Ar$ follows the order $Na > Mg > Cl > Ar$.
Statement $(II)$: Among $Ca$,$Al$,$Fe$ and $B$,the third ionisation enthalpy is very high for $Ca$.

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