Solution

The boiling point of a substance depends on the intermolecular forces of interaction such as van der Waal forces, dipole-dipole, ion-dipole, H-bonding etc.
Higher is the magnitude of attraction among molecules more will be the boiling point.
Since among the given options, alcohols have dipolar interaction and can for intermolecular H-bonds. therefore will have the highest boiling point.
Hence, $$A$$ is correct.