This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
[{'content': "Which medicine claims to be the world's first organized body of medical knowledge? \nSelect and explain. \nA. Indian, B. Chinese, C. Egyptian, D. Mesopotamian", 'role': 'user'}, {'content': "Answer: B \nExplanation: Chinese medicine claims to be the world's first organized body of medical knowledge, dating back to 2700BC, based on 2 principles: yang and yin.", 'role': 'assistant'}]