Benedict's solution is an alkaline copper sulfate solution which is used to detect the presence of aldehyde groups. In the presence of Benedict's solution, the aldehyde group is oxidized and the aqueous blue Cust ion is reduced to a red Cu20 precipitate. Sugars such as glucose, which produce the red precipitate when Benedict's solution is added, are called reducing sugars because they can reduce Cuz to Cut. Which of the following carbohydrates would give a positive reaction with Benedict's reagent? a. galactose; b. sorbitol (see below); c. B-ethylglucoside; d. gluconate (see below). COO CH,OH H-C-OH H-C-OH HO-C-H HO-C-H H-C-OH H-C-OH H-C-OH H-C-OH CH2OH CH2OH Gluconate Sorbitol O All of these sugars are reducing. O Galactose and gluconate are reducing sugars. O Among these sugars, only galactose is a reducing sugar. O Among these sugars, only B-ethylglucoside is a reducing sugar