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: Medicine
[{'content': "Which of the following is a 'Small Vessel Vasculitis': \nSelect and explain. \nA. Polyaeritis Nodosa (PAN), B. Microscopic polyangitis, C. Giant cell vasculitis, D. Takayasu's Disease", 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is B (Microscopic polyangitis): Miscroscopic Polyangitis (Microscopic Polyaeritis) is classified as 'Small Vessel Vasulitis' Polyaeritis Nodosa (PAN) is classified as 'Medium Vessel' vasculitis, while, Giant cell vasculitis(Temporal) and Takayasu disease are both classified as 'Large Vessel' vasculitides.", 'role': 'assistant'}]