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
True about point source epidemic are all except - 
Select and explain. 
A. The curve has rapid rise and slow decline, B. All cases occur in one incubation period, C. One single peak only, D. No secondary curves
A: The curve has rapid rise and slow decline
Answer: A: The curve has rapid rise and slow decline 
Explanation: Epidemic curve of point source epidemic has -

Rapid rise    
Rapid fall  
No secondary wave