The major products A and B for the following reactions are, respectively:

Step-by-step solution

1. In polar aprotic solvent, primary alkyl halides undergo S N 2 reaction with KCN, to give alkyl nitrile. 2. Alkyl nitriles, reduce in presence of H 2 / Pd, give 1 o − amines. 3. Cyclic ketones, on reduction with H 2 / Pd, form 2 o − alcohol. H 2 / P d reduces - C N into - C H 2 - N H 2