This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Endemic Disease means that a disease - \nSelect and explain. \nA. Occurs clearly in excess of normal expectancy, B. Is constantly present in a given population group, C. Exhibits seasonal pattern, D. Is prevalent among animals', 'role': 'user'}, {'content': "Answer: B \nExplanation: Endemic refers to the constant presence of a disease or infectious agent within a given geographic area or population groups, without impoation from outside Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 101", 'role': 'assistant'}]