JEE Main · 2020 · 08 Jan 2020 · Shift 1 · Chapter_pending

In the first sequence the Grignard reagent $\mathrm{C}{\mathrm{H}}_3\mathrm{MgBr}$ adds across the nitrile carbon, and acidic hydrolysis with ${\mathrm{H}}_3{\mathrm{O}}^{+}$ then turns the intermediate into a ketone, product A. In the second, lithium aluminium hydride reduces the nitrile all the way to a primary amine, product B. The products are therefore the ketone and the primary amine.