Mutarotation is shown by:

glucose

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sucrose

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starch

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maltose

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Solution

The correct option is A glucose
Glucose doesn't have a glycosidic linkage (while all other have it) so when it is dissolved in water, both $α$ and $β$ glucose are formed and they are in equilibrium with each other. This changes the rotation and is called mutarotation. So, glucose shows mutarotation.

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