Which one of the following is non-reducing sugar?

Glucose

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Arabinose

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Fructose

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Sucrose

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Solution

The correct option is C Sucrose
Glucose, arabinose and fructose compounds have $- O H$ groups attached to the anomeric carbon so they can reduce other compounds whereas sucrose does not have hydroxyl group at anomeric position. So it is a non-reducing sugar.

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