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': 'The anticoagulant of choice for performing coagulation studies is - \nSelect and explain. \nA. EDTA, B. Heparin, C. Tri sodium citrate, D. Double oxalate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The most commonly use anticoagulant for in vitro Coagulation Studies is Citric Acid.It is generally employed in the form of Sodium Citrate.\nIn Vitro use of anticoagulants\n\nFor coagulation studies-Sodium Citrate\nFor Hematological studies-EDTA\nFor estimation of ESR\n\n\nWintrobes method-Double oxalate.\nWestergren method-Sodium Citrate.', 'role': 'assistant'}]