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: Medicine
Devi, a 28 year female, has diarohea, confusion, high grade fever with bilateral pneumonitis.The diagnosis is - 
Select and explain. 
A. Legionella, B. Neisseria meningitidis, C. Streptoccocos pneumoniae, D. H. influenzae
A: Legionella
Answer: A: Legionella 
Explanation: None