$A$ carbohydrate consists of

Which among the following is a product of hydrolysis of one mole of raffinose?

Which carbon atom of glucose, numbered from $1$ to $6$, forms a hemiacetal structure by reacting with the $-CHO$ group to close the ring?

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:

Among the following statements about the molecules $X$ and $Y$, which one$(s)$ is/are correct?

Stachyose is a