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': 'All are true about chickenpox except \nSelect and explain. \nA. Pleomorphic rashes seen, B. Centripetal in distribution, C. Crusts contain live virus, D. Rapid progression from macule to vesicle', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]