Which of the following has the minimum ionization energy?

$A$ sudden large jump between the values of second and third ionisation energies of an element would be associated with the electronic configuration:

Among the second period elements,the actual ionization enthalpies are in the order $Li < B < Be < C < O < N < F < Ne$. Explain why:
$(i)$ $Be$ has higher $\Delta_{i}H$ than $B$
$(ii)$ $O$ has lower $\Delta_{i}H$ than $N$ and $F$?

The value of ionization energy of noble gases is ......... .

The first ionization potential $(IP)$ of $Be$ $(Z=4)$ is higher than which of the following elements?
$(a) B (Z=5)$
$(b) Mg (Z=12)$
$(c) Li (Z=3)$
$(d) Al (Z=13)$
$(e) K (Z=19)$

The correct order of second $I.E.$ of $C$,$N$,$O$,and $F$ is: