Structures of four disaccharides are given be | vedclass

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(A) sugar is non-reducing if it does not have a free hemiacetal or hemiketal group, meaning both anomeric carbons are involved in the glycosidic linka

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(A) sugar is non-reducing if it does not have a free hemiacetal or hemiketal group, meaning both anomeric carbons are involved in the glycosidic linkage.In the structure shown in image $278743-a$ (sucrose), the glycosidic linkage is between the $C1$ of $\alpha-D-glucose$ and the $C2$ of $\beta-D-fructose$.Since both anomeric carbons are involved in the linkage, there is no free hemiacetal group, making it a non-reducing sugar.The other structures $(278743-b, 278743-c, 278743-d)$ contain at least one free anomeric carbon (hemiacetal group), making them reducing sugars.

Structures of four disaccharides are given below. Among the given disaccharides, the non-reducing sugar is:

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