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
All of the following statements regarding bronchial cysts are true except-a) Seen in mediastinumb) 50-70% occur in lungc) Are commonly infectedd) Multilocular 
Select and explain. 
A. abc, B. acd, C. bcd, D. bd
C: bcd
Answer: C: bcd 
Explanation: None