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 in negative, D. May be false negative in immunocompromised patients
C: No risk in negative
Answer: C: No risk in negative 
Explanation: None