This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood transfusion, Subject name: Pathology
[{'content': 'Which of the following tubes contain Sodium fluoride as anticoagulant? \nSelect and explain. \nA. <img style="max-width: 100%" src=" />, B. <img style="max-width: 100%" src=" />, C. <img style="max-width: 100%" src=" />, D. <img style="max-width: 100%" src=" />', 'role': 'user'}, {'content': 'Answer: C \nExplanation: This tube has sodium citrate .Ratio of chemical to blood is 1:9 This tube has heparin This tube contains EDTA This tube has potassium oxalate and sodium fluoride Sodium fluoride inhibits glycolysis and this tube is used for glucose estimation', 'role': 'assistant'}]