Answer:
A
Step-by-step explanation:
I believe the answer is A. One is polar and One is non polar. H20 is the polar one. Polar beans there is a charge to it and the bonds are unevenly distributed. Since the hygrogen molecules are negatively charged, they make it polar. This is why water can mix with salt and stuff. O2 is non polar because the bonds are equal. There is a even distribution of electrons between the two oxygens so it has an even balance. This causes it to be non-polar.
That is why I think it is A