Organic Chem: A hexose A was obtained after (-) glyceraldehyde underwent three successive Killani-Fischer syntheses. Oxidation of A with nitric acid forms an optically inactive aldaric acid B. Wohl degradation of A followed by nitric oxidation gives an optically active aldaric acid C. Wohl degradtion of C forms threose. Draw fischer projections for A, B, and C. Please help. Point will be awarded