This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology and Rheumatology, Subject name: Medicine
[{'content': "Digital gangrene as shown below is seen most likely in which condition? \nSelect and explain. \nA. Takayasu, B. Kawasaki, C. PAN, D. Wegener's", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. PANImage shows digital gangrenea. This is characteristically seen in medium vessel vasculitisb. Polyarteritis nodosa (PAN) is medium vessel vasculitis having vascular infarcts leading to gangrenec. Diagnosed by presence of P-Anca antibodies.', 'role': 'assistant'}]