This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Viral Diseases in Children, Subject name: Pediatrics
[{'content': 'Nagayama spots are seen in: \nSelect and explain. \nA. Measles, B. Roseola infantum, C. Mumps, D. Rubella', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nagayama spots: Roseola infantum Koplik spots- Measles Forchheimer spots- Rubella', 'role': 'assistant'}]