The answer to this is A. A polar covalent bond is present in the water. This is a type of bond wherein the different electrons are closer to the oxygen nucleus as compared to the hydrogen nucleus. What is a polar covalent bond in the first place?
This is known to be an unstable type of bond as the electrons are shared between atoms in an unequal manner. A nonpolar covalent bond is composed of bonds that have the same number of electrons. Take note that this can occur in two similar atoms or two completely different atoms.
The bond present in water is a Polar Covalent Bond. The Polarity exists because of a huge electronegativity difference between Oxygen and Hydrogen. Both Hydrogens tend to have a positive charge and the Oxygen has -2 charge on it.