Which of the following are monosaccharides?

• A. Galactose, Sucrose, Glucose
• B. Maltose, Fructose and Lactose
• C. Glucose, Fructose and Galactose
• D. Lactose, Maltose and Sucrose

Answer: (C)

Monosaccharides are the simplest carbohydrates, single sugar units that cannot be broken down into smaller sugars. Glucose, fructose, and galactose are all individual sugar molecules, used as immediate energy sources or building blocks. In contrast, disaccharides are made of two monosaccharide units linked together, such as sucrose (glucose + fructose), lactose (glucose + galactose), and maltose (two glucose units). So the set that contains only monosaccharides is glucose, fructose, and galactose, making it the correct choice.