46. A mutase catalyzes which of the reactions, and belongs to which class of enzymes? (A) 2-phosphoglyceratephosphoenolpyruvate + H₂O; lyase (B) pyruvate + NADH + H⁺ lactate + NAD⁺; oxidoreductase (C) 3-phosphoglycerate 2-phosphoglycerate; isomerase (D) dihydroxyacetone phosphateglyceraldehyde-3-phosphate; isomerase (E) glucose-6-phosphatefructose-6-phosphate; isomerase