$(A)$ ${X}$ is a reducing sugar and ${Y}$ is a non-reducing sugar
$(B)$ ${X}$ is a non-reducing sugar and ${Y}$ is a reducing sugar
$(C)$ The glucosidic linkages in ${X}$ and ${Y}$ are $\alpha$ and $\beta$, respectively
$(D)$ The glucosidic linkages in ${X}$ and ${Y}$ are $\beta$ and $\alpha$, respectively
| Item $I$ | Item $II$ |
| $A$ Ester test | $P$ Tyr |
| $B$ Carbylamine test | $Q$ Asp |
| $C$ Phthalein dye test | $R$ Ser |
| $S$ Lys |