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': 'Which of the following is not true about the Tuberculin test - \nSelect and explain. \nA. It is only tool available for estimating the prevalence of TB in a community, B. Induration of 10 mm indicates a positive test, C. It is a specific test, D. New cases occur more commonly in patients who are tuberculin reactors', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The validity of tuberculin test is subject to variability. It is limited by lack of specificity Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 196', 'role': 'assistant'}]