Select the reagents that reduce nitriles to primary amines : A. (i) LiAlH ₄ ; (ii) H ₂ O B. Sn + HCl C. H ₂/ Ni D. Na(Hg) / C ₂ H ₅ OH E. Br ₂/ aq. NaOH Choose the correct answer from the options given below :

Step-by-step solution

Nitriles ( R-CN ) can be reduced to primary amines ( R-CH₂NH₂ ) using strong reducing agents or catalytic hydrogenation. Reagent A: LiAlH ₄ followed by hydrolysis is a strong reducing agent that reduces nitriles to primary amines. Reagent C: H ₂/ Ni (catalytic hydrogenation) reduces nitriles to primary amines. Reagent D: Na(Hg) / C ₂ H ₅ OH (Mendius reduction) provides nascent hydrogen and reduces nitriles to primary amines. Reagent B: Sn + HCl is typically used to reduce nitro compounds to amines. (Note: SnCl ₂ +