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': 'Which organism causes hemolytic uremic syndrome \nSelect and explain. \nA. Neisseria, B. Salmonella, C. Pseudomonas, D. E. Coli', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hemolytic uremic syndrome (HUS) is a type 3 hypersensitivity reaction associated with small vessel vasculitis.\n• Organisms causing HUS is E.Coli (particularly EHEC) and shigella dysenteriae.', 'role': 'assistant'}]