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': 'Subacute sclerosing panencephalitis is late neurological complication associated with infection due to \nSelect and explain. \nA. Mumps virus, B. Measles virus, C. Rubella virus, D. Para influenza virus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Subacute sclerosing panencephalitis occurs 7 - 13 years after primary meastes infection. It has fatal outcome.', 'role': 'assistant'}]