This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
[{'content': 'An 8-year-old boy from an impoverished inner-city area has never been vaccinated appropriately. He develops fever, cough, and coryza. The next day, blue white spots develop on the buccal mucosa. On the third day, an erythematous, nonpruritic maculopapular rash develops on the face and spreads over the entire body. Which of the following is the most likely complication? \nSelect and explain. \nA. pneumonia, B. encephalitis, C. otitis media, D. bronchitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The most common complication of measles is otitis media, other complications include mastoiditis, pneumonia, bronchitis, encephalitis, and lymphadenitis. Otitis media is usually a bacterial superinfection, and should be treated with antibiotics.', 'role': 'assistant'}]