If the difference in electronegativities of two elements is very large,then

The relative order of electronegativity of $C$,$Ge$,and $Pb$ is

Assertion : Electron affinity refers to an isolated atom's attraction for an additional electron while electronegativity is the ability of an atom of an element to attract electrons towards itself in a shared pair of electrons.
Reason : Electron affinity is a relative number and electronegativity is experimentally measurable.

The outermost electronic configuration of the most electronegative element is

In $C$,$N$,$O$,and $F$,the electronegativity:

Which element has the lowest electronegativity?