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
[{'content': 'True about legionella: \nSelect and explain. \nA. Most common mode of transmission is aerosol inhalation, B. There is no man to man transmission, C. Prolonged carrier are common, D. All are true', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is. 'b' i. e., There is no man to man transmission", 'role': 'assistant'}]