Answer
Option d is the answer.
Work Step by Step
Hydrogen bonding results from attractive force between the hydrogen atom of one molecule and an electronegative atom of another molecule. Intramolecular hydrogen bonding also is exhibited by some molecules.
Step 2: Ionic bond is formed by oppositely charged ions. A hydrogen bond is not formed by ions and so, is not an ionic bond. Hence, option a is incorrect.
Step 3: Covalent bond is formed by sharing of electrons, Hydrogen bonding is not formed by the sharing of electrons between atoms. Hydrogen bonds are not non-polar covalent bonds. So, the option b is incorrect.
Step 4: Covalent bonds that are partially ionic are called polar covalent bonds. Polar covalent bonds have the electron pair displaced toward the more electronegative atom. There is an unequal sharing of electrons. So option c is incorrect. Since none of the above options are correct, option d which is none of these is the correct choice.
