This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': "Granuloma is pathological feature of all except \nSelect and explain. \nA. Giant cell aeritis, B. Microscopic polyangitis, C. Wegener's granulomatosis, D. Churg Strauss disease", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref Robbins 7/e p540 Microscopic polyangiitis (MPA) is a disorder that causes blood vessel inflammation (vasculitis), which can lead to organ damage. The kidneys, lungs, nerves, skin, and joints are the most commonly affected areas of the body.', 'role': 'assistant'}]