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: Social & Preventive Medicine
[{'content': 'Father of Evidence Based Medicine is \nSelect and explain. \nA. Sackett, B. Da vinci, C. Hippocrates, D. Tolstoy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Wrote the following books:\n1. Clinical Epidemiology\n2. Evidence Based Medicine', 'role': 'assistant'}]