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: Medicine
[{'content': 'True about Roseola infantum - \nSelect and explain. \nA. Caused by HHV 6 & 7, B. Rash appears in trunk, C. Defeverse. rash begins, D. All the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]