If your conclusion does not agree with (disproves) your hypothesis:
the experiment must be wrong
your hypothesis is right
your hypothesis is probably wrong
your observations or data must be wrong

your hypothesis is probably wrong

Explanation:

A hypothesis is a statement which is based upon assumption of some process or event. The evidences available in the hypothesis are limited. The hypothesis can be proved by the experimental analysis.

If the conclusion of the experimental process does not match with that of hypothesis. This indicates that the hypothesis is wrong as the hypothesis can be true or false it directly dependents upon the experimental results.  

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

i think its both a and b