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': 'Occurence of disease in excess of expected frequency is known as \nSelect and explain. \nA. Endemic disease, B. Epidemic disease, C. Ecdemic disease, D. Sporadic', '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 group without impoation from outside. Exotic: diseases which are impoed into a country in which they do not otherwise occur as for example rabies in the UK . Epizootic: an outbreak of the disease in an animal population. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 101", 'role': 'assistant'}]