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
Which is the calamity with most amount of damage - 
Select and explain. 
A. Flood, B. Eahquake, C. Landslides, D. Volcanoes
A: Flood
Answer: A: Flood 
Explanation: Ans. is 'a' i.e., Floods