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
[{'content': 'Fibrinoid necrosis is seen in following except - \nSelect and explain. \nA. PAN, B. Diabetes mellitus, C. Malignant hypertension, D. SLE', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fibrinoid necrosis\n\nFibrinoid necrosis is a special form of necrosis typically occurs when complexes of antigen and antibodies\xa0are deposited in the walls of arteries. Deposits of these "immune complexes", together with fibrin that has\xa0leaked out of vessels, result in a bright pink and amorphous appearance in H & E stains, called\xa0"fibrinoid" (fibrin-like) by pathologists.\nDiseases causing fibrinoid necrosis are malignant hypertension (most common), PAN, SLE, SABE, acute\xa0rheumatic fever (Aschoff nodule), RA, HSP, HBV, near peptic ulcer and malignancy.\n\nNote: In fibrinoid necrosis, there is no deposition of fibrin. It is fibrin-like matter, which is deposited', 'role': 'assistant'}]