Identify the monomer of starch.

Which of the following forms osazone with phenylhydrazine?

Identify the correct statement about glucose from the following.

The reaction of glucose with acetic anhydride confirms the:

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

The letters $'D'$ or $'L'$ before the name of a stereoisomer of a compound indicate the correlation of configuration of that particular stereoisomer. This refers to their relation with one of the isomers of glyceraldehyde. Predict whether the following compound has $'D'$ or $'L'$ configuration.