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
The most appropriate test to asssess the prevalence of tuberculosis infection in a community is - 
Select and explain. 
A. Mass miniature radiotheraphy, B. Sputum examination, C. Tuberculin test, D. Clinical examination
C: Tuberculin test
Answer: C: Tuberculin test 
Explanation: <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>