This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pathology
[{'content': 'A patient is a known case of polyarteritis nodosa. On examination of biopsy, accumulation of amorphous, basic, proteinaceous material in the vessel wall was seen. This finding is suggestive of: \nSelect and explain. \nA. Fibrinoid necrosis, B. Leucocytoclastic vasculitis, C. Hyaline arteriosclerosis, D. Caseous necrosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Fibrinoid necrosisFibrinoid necrosis is a form of necrosis, or tissue death, in which there is accumulation of amorphous, basic, proteinaceous material in the tissue matrix with a staining pattern reminiscent of fibrin.How to differentiate from hyaline arteriosclerosis?- please remember in fibrinoid necrosis, pink material has fibrin like quality as opposed to glassy homogenous hyaline in hyaline arteriosclerosis, (refer to image 2)', 'role': 'assistant'}]