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: Pathology
Which is not a type HI hypersensitivity reaction 
Select and explain. 
A. TB, B. Rheumatoid ahritis, C. SIF, D. Ahus reaction
A: TB
Answer: A: TB 
Explanation: Ans. is 'a' i.e., Tuberculosis Tuberculosis is a delayed hypersensitivity or type IV hypersensitivity reaction.