Consider the given reactions:
i. RCNReduction−−−−−−→A
ii. RCN(i) CH3MgBr−−−−−−−−→(ii)H2OB
iii. RCNHydrolysis−−−−−−→(Partial)C
iv. RCN(i) Reduction−−−−−−−−→(ii) HONOD
Based on the products of the reactions, we have: