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
A community has population of 20% below 15 years and 15% above 65 years of age. calculate the dependency ratio. 
Select and explain. 
A. 34%, B. 40%, C. 54%, D. 85%
C: 54%
Answer: C: 54% 
Explanation: None