Among the following options,the sequence of increasing first ionisation potential will be

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

If energy absorbed for conversion of $M_{(g)}$ into $M_{(g)}^{+}$ for $Li, Be, B, C$ and $N$ is $a, b, c, d$ and $e$ (in $k\,cal/mol$) respectively,then the correct order will be:

The elements which occupy the peaks of the ionisation energy curve are

Which element having the following electronic configurations has the minimum ionization potential?

Which of the following elements has the highest second ionisation potential?