This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
[{'content': 'All of the following conditions are associated with raised ANCA except \nSelect and explain. \nA. Wegener granulomatosus, B. Polyaeritis nodosa, C. Microscopic poly angitis, D. Churg strauss syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Classification of vasculitis Large vessel vasculitis *Giant cell (temporal) aeritis - seen in >50yrs of age*Takayasu aeritis - seen in <50yrs of age Medium vessel vasculitis *Polyaeritis nodosa - necrotizing inflammation of renal vessels. Spares pulmonary vessels. *Kawasaki disease - seen in <5yrs of age Small vessel vasculitis *Wegener granulomatosis -positive for c-ANCA(Ab against proteinase 3)*Churg strauss and microscopic polyangitis - positive for p-ANCA (Ab against myeloperoxidase) (Ref: Robbins 8/e p511)', 'role': 'assistant'}]