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: Surgery
[{'content': "True statement of Buerger's desease is/are -a) Small and medium sized vessels involvedb) Commonly involves upper limb than lower limbsc) Common in maled) Common in female \nSelect and explain. \nA. a, B. bc, C. ac, D. b", 'role': 'user'}, {'content': "Answer: C \nExplanation: Buerger's ds. may involve both upper or lower extremity. It is more common in lower limbs", 'role': 'assistant'}]