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': 'Most common organism which can contaminates crowded army camps is ? \nSelect and explain. \nA. Klebsiella, B. E. coli, C. Neisseria meningitidis, D. Staphylococcus', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Neisseria meningitidis Epidemics of Neisseria meningitidis usually occur in closed crowded conditions like jails or army camps.", 'role': 'assistant'}]