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: Social & Preventive Medicine
[{'content': 'The following rodent is the natural reservoir of plague \nSelect and explain. \nA. Mus musculus, B. Tatera indica, C. Rattus Rattus, D. Rattus norvegicus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]