This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Anticoagulant used for chelating calcium - \nSelect and explain. \nA. E DTA, B. Oxalate, C. Sodium citrate, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer-D. All of the aboveMost of the anticoagulants used in the laboratory act by binding calcium as an insoluble salt or soluble but un-ionized salt.Thesecalciumchelatinganticoagulantsare :-EDTADouble oxalateSodium citrateSodiumJluoride', 'role': 'assistant'}]