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': 'ICD chapter 21 chapter all except \nSelect and explain. \nA. Alcohol, B. Tobacco, C. Injury, D. Drugs', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Chapter XXI includes factors influencing health status and contact with health services. Ref : Park&;s textbook of preventive and social medicine; 23rd edition - Page no 50', 'role': 'assistant'}]