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: Microbiology
[{'content': 'Most common infection caused by streptococcus pneumonia ? \nSelect and explain. \nA. Otits media, B. Sore throat, C. Meningitis, D. Pneumonia', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Otitis media Impoant infections caused by streptococcus pneumoniae The source of human infection is the respiratory tract of carriers and less often, of patients. Pneumococci occur in the throat of approximately half of the population sampled at any time. Str. pneumoniae is the most frequent cause of pneumonia. The commonest pneumococcal infections are otitis media and sinusitis. Meningitis is the most serious of pneumococcal infections. Empyema is the most common complication of pneumococcal pneumonia.", 'role': 'assistant'}]