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': '18 years old girl presents with watery diarrhea. Most likely causative agent - \nSelect and explain. \nA. Rota virus, B. V. cholerae, C. Salmonella, D. Shigella', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]