A compound (X) has the molecular formula ${\text{C}}_3{\text{H}}_7\text{NO}$ gives Y on reaction with $\text{KOH}$ and ${\text{Br}}_2$. Y upon treatment with  ${\text{HNO}}_2$ evolves  ${\text{N}}_2$ and gives an alcohol Z which gives iodoform test. The compound X can be

Reaction of X with ${\text{Br}}_2+\text{KOH}$ suggests that X is an amide. Evolution of ${\text{N}}_2$ and formation of alcohol suggests that Y is a  $1^{\circ }$ aliphatic amine. lodoform test of Z suggests that it is an alcohol containing     group.