To answer this question, we need to know that: The greater the electronegativity, the greater the polarization of the bond.
Is there a way for us to know the order of electronegativity of the most electronegative elements, which are:
F > O > N > Cl > Br > I > S > C > P > H
We can see that all molecules are bound to hydrogen. Therefore, we need to see which is the most electronegative element of the alternatives:
O>N>S>C
So the answer is:
Alternative "A" H2O
