83. In the process of glycolysis, several reactions take place. Which of the following statements related to them are correct? ① Two molecules of pyruvate are produced by glycolysis. ② Under anaerobic condition, pyruvate can be oxidized to CO2, generating more ATP molecules. ③ Hexokinase is involved in glycolysis. ④ Frucose-1,6-biphosphate is not generated from glucose-1,6-biphosphate. ⑤ 1,3-Bisphosphoglycerate is generated from glycolysis. ⑥ Eight ATP molecules are generated from the conversion of glucose to pyruvate. (A) ②④⑤⑥ (B) ①②③④ (C) ②③④⑥ (D) ①③④⑤ (E) ①②④⑥