Which of the following is a reducing sugar?

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(D) reducing sugar is a carbohydrate that possesses a free aldehyde or ketone group,which allows it to act as a reducing agent. $Starch$,$Cellulose$,a

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Fructose

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(D) reducing sugar is a carbohydrate that possesses a free aldehyde or ketone group,which allows it to act as a reducing agent. $Starch$,$Cellulose$,and $Glycogen$ are polysaccharides and are non-reducing sugars. $Fructose$ is a monosaccharide that contains a ketonic group. Although it is a ketose,it undergoes tautomerization in alkaline solutions to form glucose and mannose,which contain aldehyde groups. Therefore,$Fructose$ acts as a reducing sugar.

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