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': '1CD 10 has..............chapters: \nSelect and explain. \nA. 2, B. 12, C. 22, D. 32', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 22', 'role': 'assistant'}]