Physical Properties of Carboxylic Acids and Its Derivatives

Carboxylic acid have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their:

Which carboxylic acid has maximum solubility in water?

$\mathrm{Directions} :$ Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
$\mathrm{Assertion}:$$\mathrm{p}-$Hydroxybenzoic acid has a lower boiling point than $\mathrm{o}-$hydroxybenzoic acid.

$\mathrm{Reason}:$$\mathrm{o}-$Hydroxybenzoic acid has intermolecular hydrogen bonding.