$Statement-1$: $p$-Hydroxybenzoic acid has a lower boiling point than $o$-hydroxybenzoic acid.
$Statement-2$: $o$-Hydroxybenzoic acid has intramolecular hydrogen bonding.

• A
  $Statement-1$ is True,$Statement-2$ is True; $Statement-2$ is a correct explanation for $Statement-1$.
• B
  $Statement-1$ is True,$Statement-2$ is True; $Statement-2$ is $NOT$ a correct explanation for $Statement-1$.
• C
  $Statement-1$ is True,$Statement-2$ is False.
• D
  $Statement-1$ is False,$Statement-2$ is True.