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: Microbiology
In Legionnaire's disease, the culture medium used is: 
Select and explain. 
A. Thayer-Main medium, B. BCYE medium, C. Chocolate agar, D. Bordet Gengou medium
B: BCYE medium
Answer: B: BCYE medium 
Explanation: BCYE medium