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': 'All of the following statements regarding bronchial cysts are true except-a) Seen in mediastinumb) 50-70% occur in lungc) Are commonly infectedd) Multilocular \nSelect and explain. \nA. abc, B. acd, C. bcd, D. bd', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]