This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
fibrinoid necrosis is senn all the following except ? 
Select and explain. 
A. malignant hypeension, B. acute rheumatic fever, C. polyahropathy, D. polyairitis nodosa
C: polyahropathy
Answer: C: polyahropathy 
Explanation: Fibrinoid necrosis : alSo called "fibrinoid degeneration" It appears as strongly eosinophilic, reflexible small granules, pieces or amorphous materials, in the wall of blood vessel or in connective tissue. The original structure is destroyed. It can be seen in rheumatic fever, allergic vasculitis and other immune complex injury . * (type 3 hypersentitivity reaction) ref : robbins 10th ed