The specific chemical reaction equations for the options are missing from the provided text. Generally, primary amines are prepared by reactions such as the reduction of nitro compounds ($R-NO_2 \rightarrow R-NH_2$), reduction of nitriles ($R-CN \rightarrow R-CH_2NH_2$), reduction of amides, Gabriel phthalimide synthesis, and the Hoffmann bromamide degradation. Reactions that typically do not result in a primary amine include the reduction of isocyanides ($R-NC \xrightarrow{[H]} R-NH-CH_3$, which yields a secondary amine) or further alkylation of primary amines. Without the exact reaction schemes, the specific non-primary amine forming reaction cannot be conclusively identified.