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 assess 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: The tuberculin test is the only means of estimating the prevalence of infection in a population. Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 195