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: Microbiology
[{'content': 'Most common extracutaneous site of involvement in varicella infection? \nSelect and explain. \nA. Heart, B. Lungs, C. Liver, D. CNS', 'role': 'user'}, {'content': 'Answer: D \nExplanation: M/C\xa0extracutaneous complication is CNS involvement (cerebellar ataxia, encaphalits, aseptic meningitis).', 'role': 'assistant'}]