3.Which of the following description is correct regarding carbohydrates? (A) The sizes of different carbohydrates can be ordered by oligosaccharides polysaccharides ＞ monosaccharides. (B) All the monosaccharides including F dihydroxyacetone 」 and 『 glyceraldehyde」 contain one or more isomeric forms. (C) Glycosaminogl ycans, the type of heteropolysaccharide, are a family of linear polymers composed of repeating disaccharide units. (D) The hydrogen atom of one monosaccharide can be added to anomeric carbon of a 2md monosaccharide to form an acetal. (E) None of the above.