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
In a outbreak of cholera in village of 2,000 population, 20 cases have occurred and 5 died. Case fatality rate is - 
Select and explain. 
A. 1%, B. 0.25%, C. 5%, D. 25%
A: 1%
Answer: A: 1% 
Explanation: Ans. is 'a' i.e., 25%