Carboxylic acids have higher boling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their _________.

The correct option is C Formation of strong intermolecular H-bonding than alcohol
Carboxylic acids have higher boiling points than aldehydes, ketones, and given alcohol of comparable molecular mass. This is because of formation of intermolecular H-bonding. Hence, the correct answer is option (c).