Clemmensen reduction of ketones is carried out in

Product $(C)$ 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:

Reduction of the lactol $S$ with sodium borohydride $(NaBH_4)$ gives:

Which of the following can decolorize aldehydes and ketones?

Explain the iodoform test.