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 best suited anticogulant for osmotic fragility test is - \nSelect and explain. \nA. Heparin, B. EDTA, C. Trisodium citrate, D. Potassium oxalate', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Heparin", 'role': 'assistant'}]