Which of the following is a reducing sugar

Sucrose

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Galactose

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Gluconic acid

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β

- methyl galactoside

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Solution

The correct option is B Galactose
Reducing sugars are sugars that are capable of reducing or donating an electron during a chemical reaction, because they have a free aldehyde or ketone group in their structure. Galactose is a reducing sugar as it has a free aldehyde group.
Hence B is the correct option.

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