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: Microbiology
[{'content': 'True about tuberculin test are all except: \nSelect and explain. \nA. Recent conversion in adult is an indication for ATT, B. INH prophylaxis is started, if the test is positive, C. No risk of developing TB, if tuberculin test is negative, D. May be false negative in immunocompromised patients', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A negative tubercle test indicates that the person has never come in contact with tubercle bacilli.\nParija SC. Textbook of Microbiology & Immunology. Elsevier Health Sciences; 2014. Page: 355', 'role': 'assistant'}]