$50\mathrm{g}$ of sucrose is hydrolysed to a mixture of glucose and fructose. Sucrose is dextrorotatory, however the mixture formed is laevorotatory. This is because:

Aspartame $\left(\mathrm{X}\right)$  is an artificial sweetening agent and is $200$ times sweeter than sugar. It is an ester of the dipeptide of :

The monosaccharide present in the following disaccharide is

In $\mathrm{\alpha }-\mathrm{D}$-galactopyranose, the vicinal hydroxyl groups are cis to each other

The product may be