This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'The most appropriate test to asssess the prevalence of tuberculosis infection in a community is - \nSelect and explain. \nA. Mass miniature radiotheraphy, B. Sputum examination, C. Tuberculin test, D. Clinical examination', 'role': 'user'}, {'content': 'Answer: C \nExplanation: <p> Tuberculin test is the &;only way of estimating the prevalence of infection in a population. Positive reaction to the test : evidence of past or present infection by M.tuberculosis. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:185-186. <\\p>', 'role': 'assistant'}]