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 mantoux is - 
Select and explain. 
A. False negative in fulminant diseases, B. If once done, next time it is always positive, C. Results are given in terms of positive & negative, D. Indurations given in terms of length & breadth
A: False negative in fulminant diseases
Answer: A: False negative in fulminant diseases 
Explanation: None