Consider the following reactions giving major product. Identify the correct reaction.

Step-by-step solution

In reaction (1), Gabriel phthalimide synthesis cannot be used to prepare aniline because aryl halides do not undergo nucleophilic substitution ( S_N2 ) with potassium phthalimide due to partial double bond character of the C-X bond. In reaction (2), the reduction of isocyanide ( R-NC ) with Sn/HCl yields a secondary amine ( R-NHCH₃ ), not a primary amine ( R-CH₂NH₂ ). In reaction (3), propanamide reacts with Br₂ and KOH (Hoffmann Bromamide Degradation) to give ethanamine. This is a correct reaction. In reaction (4)