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: Medicine
Which of the following is an example of type IV hypersensitivity: 
Select and explain. 
A. Ahrus reaction, B. Serum sickness, C. Schwazmann reaction, D. Granulomatous reaction
D: Granulomatous reaction
Answer: D: Granulomatous reaction 
Explanation: Answer is D (Granulomatous reaction): Gramdomatous inflammation/Granuloma formation is typical cif reaction to poorly digestible agents elicited tuberculosis, leprosy, fungal infection etc. It is type IV hypersensitivityQ - Robbins Ahrus reaction and serum sickness are forms of type III hypersensitivity.Q Schwazmann reaction is not an immune reaction at all. It is rather an alteration in factors affecting intravascular coagulation.