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: Dental
[{'content': 'A disease seen in excess of normal in a community results in: \nSelect and explain. \nA. Epidemic, B. Endemic, C. Pandemic, D. Endozootic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]