This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infectious Disease Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'In an outbreak of cholera in a village of 2,000 population, 20 cases have occurred and 5 died. Case fatality rate is - \nSelect and explain. \nA. 1%, B. 0.25%, C. 5%, D. 25%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans- (D) 25% Formula - No. of deaths due to a particular Disease/Cause X 100 No of cases owing to this particular cause/disease : 5 X 100 - 25% 20 Good to know-', 'role': 'assistant'}]