This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Social & Preventive Medicine
A well of contaminated water resulting in an epidemic of acute watery diarrhea is a typical example for: 
Select and explain. 
A. Common source, single exposure epidemic, B. Common source, continuous exposure epidemic, C. Slow epidemic, D. Propagated epidemic
B: Common source, continuous exposure epidemic
Answer: B: Common source, continuous exposure epidemic 
Explanation: - A well of contaminated water resulting in an epidemic of acute watery diarrhea is an example of Common source, continuous exposure epidemic as there is continuous and repeated exposure. - Multiple peaks known as SECONDARY WAVES are seen.