Is b option correct or not .
B is correct
R is Benzamide.
On reaction with NaNO2 and HCl it gives Benzoic acid and Nitrogen gas is evolved in the process.
This NaNO2 reaction is for amine
Is this applicable for amide too
NaNO2 reacts with HCl to form HNO2 which then reacts with benzamide to give benzoic acid.
Ok thanks @Rafe_Moin1