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': 'In a suspected case of legionnaires disease, medium used for culture is: \nSelect and explain. \nA. Buffered charcoal yeast extract agar, B. Thayer Main, C. Chocolate agar, D. Bordet Gengou', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Definitive method for diagnosis of Legionella infection is isolation of the organism. Buffered charcoal yeast extract agar (BCVE) supplemented with antibiotics and dye is the most sensitive medium for Legionella.', 'role': 'assistant'}]