Which of the following will not show mutarotation?

Options

A. Maltose
B. Lactose
C. Glucose
D. Sucrose

Answer

D

Explanation

Mutarotation is the interconversion of `alpha` and `beta` anomers. Since the anomeric carbons of both the glucopyranose and fructofuranose units are involved in formation of the glycosidic bond, neither monosaccharide unit is in equillibrium with its open-chain form. Thus, sucrose is a non-reducing sugar.