Answer:
The correct answer is - partially negatively charged oxygen atom of the hydroxyl group.
Step-by-step explanation:
In ethanol and water, there is a hydrogen bond present in which is the strongest intermolecular bond or interaction between molecules. Water molecules contain two hydrogen atoms and one oxygen atom with the same hydrogen bond.
The oxygen atom is partially negative which is attracted to the partially positive hydrogen atom. This same attraction found between the oxygen atom of the hydroxyl group of the ethanol.
Thus, the correct answer is - partially negatively charged oxygen atom of the hydroxyl group.