Which one of the following is a non - reducing carbohydrate?

The correct option is B $Sucrose$
A non-reducing sugar is a carbohydrate that is not oxidized by a weak oxidizing agent (an oxidizing agent that oxidizes aldehydes but not alcohols, such as the Tollen's reagent) in basic aqueous solution. The characteristic property of non-reducing sugars is that, in basic aqueous medium, they do not generate any compounds containing an aldehyde group. Example : sucrose, which contains neither a hemiacetal group nor a hemiketal group and, therefore, is stable in water.