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': 'In Wegeners glomerulonephritis characteristic feature seen is \nSelect and explain. \nA. Granuloma in the vessel wall, B. Focal necrotizing glomerulonephritis, C. Nodular glomerulosclerosis, D. Interstitial granuloma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: This is a necrotising vasculitis characterised by specific triad . Granuloma of the lung and the upper respiratory tract . Vasculitis of small to medium sized vessels . Glomerulonephritis Robinns 9 th edition page no. 353', 'role': 'assistant'}]