Chlorotone,used as a medicine,is prepared by the reaction of acetone with .....

In the following reaction,the major product $X$ is

Which among the following compounds give a yellow solid when reacted with $NaOI/NaOH$? Choose the correct answer from the options given below $:$
$(A)$ $CH_3-CH(OH)-C_2H_5$
$(B)$ $CH_3-CH_2-CH_2-OH$
$(C)$ $CH_3-CO-C_2H_5$
$(D)$ $CH_3-COOH$
$(E)$ $CH_3-CH_2-CHO$

$3$-hydroxybutanal is formed when $(X)$ reacts with $(Y)$ in a dilute $(Z)$ solution. What are $X, Y$ and $Z$?

The active ion in Tollen's reagent is

An organic compound $A$ has the molecular formula $C_3H_6O$ and it undergoes the iodoform test. When saturated with dilute $HCl$,it gives $B$ with the molecular formula $C_9H_{14}O$. $A$ and $B$ respectively are: