Identify the glycosidic linkage present in maltose.

$D$-glucose upon treatment with bromine-water gives:

Glucose molecule reacts with $X$ number of molecules of phenylhydrazine to yield osazone. The value of $X$ is

Statement $I$. Despite having an aldehyde group,glucose does not give the Schiff test.
Statement $II$. Glucose exists in $\alpha$ and $\beta$ crystalline forms.

What is the product obtained when $Br_{2}$ water reacts with glucose?

Which of the following is present in $RNA$ only?