Q. Assertion: Direct attachment of groups such as phenyl or vinyl to the carboxylic acid, increases the acidity of the carboxylic acid.
Reason :Resonance effect always increases the acidity of carboxylic acids.

 3338  205 Aldehydes Ketones and Carboxylic Acids Report Error

Solution:

This is due to greater electronegativity of hybridised carbon to which carboxyl carbon is attached.