Product $(B)$ is
Assertion $(A):$ Gabriel phthalimide synthesis cannot be used to prepare aromatic primary amines.
Reason $(R) :$ Aryl halides do not undergo nucleophilic substitution reaction.
In the light of the above statements, choose the correct answer form the options given below.

Statements$-I :$ In Hofmann degradation reaction, the migration of only an alkyl group takes place from carbonyl carbon of the amide to the nitrogen atom.
Statement$-II :$ The group is migrated in Hofmann degradation reaction to electron deficient atom.
In the light of the above statement, choose the most appropriate answer from the options given below