Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. 

Assertion(A): Benzaldehyde is less reactive in nucleophilic addition reaction than propanal

Reason(R): The polarity of the carbonyl group is reduced in benzaldehyde due to resonance

 In the light of the above statements, choose the correct answer from the options given below:

Both statements are correct. Benzaldehyde is less reactive towards nucleophilic addition reactions than propanal because the carbonyl carbon in benzaldehyde is less electrophilic. This is due to resonance stabilization of the carbonyl group with the aromatic ring, which distributes the positive charge over the system and reduces the polarity of the carbonyl carbon, making it less susceptible to attack by nucleophiles. Therefore, the reason correctly explains the reactivity of benzaldehyde.