L-Mannose is an epimer of ______ .

D-Fructose

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D-Glucose

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D-Galactose

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none of the above

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Solution

The correct option is A D-Glucose
L-mannose is epimer of D-glucose,
Epimer-Epimers are a specific type of stereoisomer that has multiple stereocenters but only differ from one another by the configuration at one of the stereogenic centers.
Stereogenic center- A stereocenter or stereogenic center is a carbon atom that has four different atoms or groups of atoms bonded to it
Example- L-Mannose and D-Glucose.

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A) On hydrolysis, lactose gives β-D-galactose and β-D-glucose

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