From the sugars shown below,which one is a non-reducing sugar?

Question

Quizplus · Accepted Answer

A non-reducing sugar is a carbohydrate that cannot serve as a reducing agent. This means it cannot donate electrons to other molecules. In order for a sugar to be a reducing agent, it must have a free aldehyde or ketone group. Sugars A, B, and D all have a free aldehyde or ketone group and are therefore reducing sugars. Sugar C, on the other hand, has undergone a chemical reaction that has modified its structure and removed its free ketone group, making it a non-reducing sugar.

From the Sugars Shown Below,which One Is a Non-Reducing Sugar