The source of an enzyme is malt and that enzyme converts $X$ into $Y . X$ and $Y$ respectively are

On prolonged heating with HI , glucose gives a compound ' $C$ ' which can be obtained by Wurtz reaction using sodium metal and compound ' $D$ ' . Identify ' $D$ '

A carbohydrate $(A)$, when treated with dilute HCl in alcoholic solution gives two isomers $(B)$ and $(C)$. $B$ on reaction with bromine water gives a monocarboxylic acid ' $Z$ ' and ' $C$ ' is a ketohexose. What is $A$ ?

Which of the following hormones is an example of polypeptide?