Concept:Fructose is the sweetest among all natural carbohydrates due to its molecular structure and ketone group.Explanation:Fructose is a monosaccharide also called levulose. It is a functional isomer of glucose. It contains a ketone group and five alcoholic groups. Its molecular formula is C6H12O6. During digestion, fructose is directly absorbed. It naturally occurs in fruits like mango, litchi, and guava. Among the given options, fructose is sweeter than glucose, sucrose, and maltose. Hence, it is the sweetest sugar.
