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: Social & Preventive Medicine
[{'content': 'The most appropriate test to assess the prevalence of tuberculosis infection in a community is: \nSelect and explain. \nA. Mass miniature radiography, B. Sputum examination, C. Tuberculin test, D. Clinical examination', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tuberculin test', 'role': 'assistant'}]