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: Unknown
[{'content': 'Buerger’s disease is not associated with: \nSelect and explain. \nA. Affects male under the age of 30 year, B. Thrombophlebitis of deep or superficial veins, C. Involvement of large sized arteries, D. Characteristic ‘corrugation’ of femoral arteries on angiography', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Buerger’s disease (Thromboangitis obliterans)\nOcclusive disease of small and medium sized arteries\nThrombophlebitis of superficial or deep veins\nRaynaud syndrome\nAffects males (<30yrs)\nAngiography sometimes shown a characteristic ‘corrugation’ of the femoral arteries as well as the distal arterial occlusions and helps to distinguish the condition from aggressive atheroma of early onset.', 'role': 'assistant'}]