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': 'Discase imported to a country for first time \nSelect and explain. \nA. Exotic disease, B. Epidemic, C. Endemic, D. Hyper endemic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]