Ranking Boiling Points of Organic Compounds

In the study of organic chemistry, functional groups play a crucial role in determining the physical and chemical properties of molecules. Consider the following compounds:

1. Propanoic acid (C₃H₆O₂)

2. Ethylamine (C₂H₇N)

3. Acetone (C₃H₆O)

4. Benzene (C₆H₆)

Based on the structural formulae of the compounds mentioned and their respective functional groups, which of the following options lists the compounds starting from the highest boiling point to the lowest boiling point?