This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
[{'content': 'Which of the following anticoagulant used in estimating blood glucose prevents glycolysis? \nSelect and explain. \nA. Oxalate, B. Citrate, C. Sodium fluoride, D. Heparin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Enolase is inhibited by fluoride, and when blood samples are taken for measurement of glucose, glycolysis is inhibited by taking the sample into tubes containing fluoride. Enolase is also dependent on the presence of either Mg2+ or Mn2+ ions. Reference: Harper; 30th edition; Page no: 171', 'role': 'assistant'}]