Which one of the following is a non reducing sugar ?

A) All monosaccharides are reducing sugars;

B) All polysaccharides are non reducing non sugars;

C) Disaccharides like maltose and lactose are reducing sugars;

D) Sucrose is a non reducing sugar because it does not contain free aldehyde group or anomeric -OH group;

     A glycosidic linkage is present between C-1 of $\mathrm{\alpha }-$D-glucose and C-2 of $\mathrm{\beta }-$D-fructose;

     No free -OH group is present on functional group(anomeric) carbon;