Which of following group includes reducing sugars?

Step-by-step solution

Reducing sugars are carbohydrates that contain a free aldehyde or ketone group and can reduce Fehling's solution and Tollens' reagent. All monosaccharides, such as glucose, fructose, and galactose, are reducing sugars. Disaccharides in which the anomeric carbon of at least one monosaccharide unit is free are also reducing sugars. Examples include maltose and lactose. In sucrose, the glycosidic bond is formed between the anomeric carbon of glucose (C1) and the anomeric carbon of fructose (C2). Since both anomeric ca