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

Which of the following statements is not true about glucose?

In $D-glucose$ $(X)$ and $D-fructose$ $(Y)$,which hydroxyl group participates in hemiacetal/hemiketal formation?

Which of the following $n$ mole molecules of carbohydrate contains $2n$ mole molecules of galactose,$n$ moles of glucose,and $n$ moles of fructose upon hydrolysis?

Which of the following is a disaccharide?

Lactose is a disaccharide of