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
During epidemics of cholera, Wells needs to be disinfected every: March 2013 (b, d, e) 
Select and explain. 
A. Hour, B. Day, C. Week, D. Month
B: Day
Answer: B: Day 
Explanation: Ans. B i.e. Day During epidemics of cholera, wells should be disinfected every day