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
In an outbreak of cholera in a 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%
D: 25%
Answer: D: 25% 
Explanation: 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-