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: Pediatrics
[{'content': 'Roseola infantum is caused by ______ \nSelect and explain. \nA. HHV 5, B. HHV 6, C. Rubella, D. Rubeola', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Roseola infantum / Exanthem subitum / Sixth disease is caused by HHV 6 or 7.', 'role': 'assistant'}]