Which of the following is the sweetest sugar?

Molisch's test is done for the detection of

Enumerate the reactions of $D$-glucose which cannot be explained by its open chain structure.

Which carbon atoms of fructose are bonded together through oxygen forming fructofuranose?

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:

Synthesis of each molecule of glucose in photosynthesis involves: