Final answer:
The organic molecule with the least hydrogen bonding potential is hydrocarbon, because it is composed of nonpolar covalent bonds and lacks highly electronegative atoms like oxygen or nitrogen that are necessary for hydrogen bonding.
Step-by-step explanation:
The type of organic molecule that has the least hydrogen bonding potential is D) hydrocarbon. Hydrocarbons are made mostly of carbon and hydrogen atoms connected by nonpolar covalent bonds. Since hydrogen bonds usually occur when hydrogen is covalently bonded to a highly electronegative atom like oxygen, nitrogen, or fluorine, hydrocarbons, which lack such electronegative atoms, have minimal potential for hydrogen bonding. Instead, their main intermolecular force is dispersion forces. Other organic molecules, such as alcohols, polypeptides, and nucleic acids, have functional groups with oxygen or nitrogen atoms that can participate in hydrogen bonding, making them more likely to engage in these interactions than hydrocarbons.