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
In a village of 5000 population, 50 persons suffered from cholera and 10 persons died. What will be the case fatality ratio? 
Select and explain. 
A. 0.20%, B. 1.00%, C. 5.00%, D. 20.00%
D: 20.00%
Answer: D: 20.00% 
Explanation: .case fatality ratio is calculated as the total number of deaths due to a paicular disease divided by total number of cases due to the same disease ,whol;e multiplied by 100 that is 10/50 *100 equals 20% .