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. $Glucose$,$fructose$,a

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All of these

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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. $Glucose$,$fructose$,and $galactose$ are all monosaccharides that contain a free carbonyl group (aldehyde in $glucose$ and $galactose$,and a ketone group in $fructose$ that can tautomerize to an aldehyde in alkaline solution). Therefore,all of these are reducing sugars.

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