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': 'True about measles –a) Rash appear first on legb) Koplik spots are seen in retinac) Long term complication follows in form of SSPEd) Caused by RNA viruse) IP–IS 2–3 day \nSelect and explain. \nA. cd, B. bc, C. bd, D. ac', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]