An Organic compound (A) with molecular formula $\mathrm{C}_3\mathrm{H}_7\mathrm{NO}$ on heating with $\mathrm{Br}_2$ and $\mathrm{KOH}$ forms a compound (B). Compound (B) on heating with $\mathrm{CHCl}_3$ and alcoholic $\mathrm{KOH}$ produces a foul smelling compound $(\mathrm{C})$ and on reacting with $\mathrm{C}_6\mathrm{H}_5\mathrm{SO}_2\mathrm{Cl}$ forms a compound (D) which is soluble in alkali. Write the structure of (A), (B), (C) and (D).