Which one of the following statements is not ture reagarding `(+)` Lactose ?

Options

A. `(+)` Lactose, `C_(12)H_(22)O_(11)` contains `8-OH` groups
B. On hydrolysis `(+)` Lactose gives equal amount of `D(+)` glucose and `D(+)` galactose
C. `(+)` Lactose is a `beta -` glucose and a molecle of `D(+)` galactose
D. `(+)` Lactose is a reducing sugar and does not exhibit mutarotation

Answer

D

Explanation

`(+)` Lactose on hydrolysis yields equal amount of `D(+)` glucose and `D(+)` galactose. These two monosachharides are joined by `beta-1,4-` glucosidic linkage. `(+)` Lactose contains hemiacetal group and thus reducing sugar. Also it exhibits mutarotation.