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
Example of Type IV hypersensitivity is ? 
Select and explain. 
A. Serum sickness, B. Granulomatous reaction, C. Schwazmann reaction, D. Ahus reaction
B: Granulomatous reaction
Answer: B: Granulomatous reaction 
Explanation: Ans. is 'b' i.e., Granulomatous reaction