This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Measles, Subject name: Social & Preventive Medicine
[{'content': "Which of the following is the 'Least common' complication of measles? \nSelect and explain. \nA. Diarrhoea, B. Pneumonia, C. Otitis media, D. SSPE", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is \'d\' i.e. SSPE SSPE is a rare complication of measles (~ 1 in 100,000 cases)"The most common complications are measles-associated diarrhoea, pneumonia and other respiratory complications and otitis media" - Park', 'role': 'assistant'}]