Concept:Benedict's solution is used to test for reducing sugars.Explanation:Benedict's solution is blue in its original state.When warmed with a reducing sugar, it forms a brick-red precipitate.The colour change from blue to brick-red confirms that a reducing sugar is present.Non-reducing sugars such as sucrose, and other biomolecules like amino acids and fatty acids, do not give this colour change with Benedict's solution.Answer:A. reducing sugar