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
[{'content': 'A community has population of 20% below 15 years and 15% above 65 years of age. calculate the dependency ratio. \nSelect and explain. \nA. 34%, B. 40%, C. 54%, D. 85%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]