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
Fibrinoid necrosis may be observed in 
Select and explain. 
A. Malignant Hypertension, B. Polyarteritis nodosa, C. Aschoff bodies, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Fibrinoid necrosis is a special form of necrosis, visible by light microscopy, usually in immune reactions in which complexes of antigens and antibodies are deposited in the walls of arteries. The deposited immune complexes, together with fibrin that has leaked out of vessels, produce a bright pink and amorphous appearance on H&E preparations called fibrinoid (fibrin-like) by pathologists