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
True about tuberculin test are all except: 
Select and explain. 
A. 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
C: No risk of developing TB, if tuberculin test is negative
Answer: C: No risk of developing TB, if tuberculin test is negative 
Explanation: A negative tubercle test indicates that the person has never come in contact with tubercle bacilli.
Parija SC. Textbook of Microbiology & Immunology. Elsevier Health Sciences; 2014. Page: 355