An organic compound 'A' on treatment with aq.KCN produces compound 'B'. Compound 'B' on reduction with Na/C₂H₅OH gives compound 'C' with molecular formula C₂H₇N. Compound 'C' reacts with NaNO₂ and HCl to form compound 'D'. Compound 'D' on treatment with acetic acid in presence of conc. H₂SO₄ produces a sweet smelling compound 'E'.
Identify the compounds 'A' to 'E'.
