Compund having lowest boiling point is:

Explanation

Option A (Carbon tetrachloride) is correct. It has the lowest boiling point because it is a nonpolar molecule with weak intermolecular London dispersion forces. In contrast, Option B (Ethyl alcohol) has a higher boiling point due to its ability to form hydrogen bonds, which are significantly stronger than dispersion forces. Option C (Benzene) has a higher boiling point than carbon tetrachloride primarily due to stronger π-π interactions despite being nonpolar. Lastly, Option D (Acetic acid) has the highest boiling point in this set due to its ability to form hydrogen bonds, which necessitates more energy to break these interactions during boiling. Hence, all other options have higher boiling points than carbon tetrachloride due to their stronger intermolecular forces.