The polarity of a covalent bond between two atoms depends upon

Select the incorrect order$(s)$ of electronegativity of the element$(s)$:

Aqueous solutions of two compounds $M_1OH$ and $M_2OH$ are prepared in two different beakers. If the $EN$ of $M_1 = 3.4$,$EN$ of $M_2 = 1.2$,$EN$ of $O = 3.5$,and $EN$ of $H = 2.1$,then the nature of the two solutions will be:

The correct order of electronegativities of $N$,$O$,$F$,and $P$ is

Which of the following is correct for the order of electronegativity?

Assertion : $F$ is more electronegative than $Cl$.
Reason : $F$ has higher electron affinity than $Cl$.