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
True about legionella: 
Select and explain. 
A. 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
B: There is no man to man transmission
Answer: B: There is no man to man transmission 
Explanation: Ans. is. 'b' i. e., There is no man to man transmission