$\alpha-D$-glucose and $\beta-D$-glucose differ from each other due to the difference in the configuration of their carbon atom at:

What is the monomer of cellulose?

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

Which among the following carbohydrate molecules is not further hydrolysed into smaller units?

The correct statement$(s)$ about the following sugars $(X)$ and $(Y)$ is:

Given below are two statements:
Statement $I$: The two cyclic forms of $D-(+)-glucose$ ($\alpha$ and $\beta$ anomers differing at $C1$ hydroxyl orientation) are two anomers of $D-(+)-glucose$.
Statement $II$: The open chain forms of $D-glucose$ and $D-fructose$ contain three similar chiral carbons at $C3$, $C4$, and $C5$.
In the light of the above statements, choose the correct answer from the options given below: