Which is the correct order of electronegativities?

The valence shell electronic configuration of the most electronegative element is..........

Which element has the highest electronegativity?

The values of electronegativity of atoms $A$ and $B$ are $1.20$ and $4.0$ respectively. The percentage of ionic character of $A-B$ bond is ............. $\%$

Fluorine is a better oxidizing agent than $Br_2$ because of........

Given that the ionization potential and electron gain enthalpy of chlorine are $13 \ eV$ and $4 \ eV$ respectively. The electronegativity of chlorine on the Mulliken scale is approximately equal to: (in $eV$)