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': 'The denominator used for calculating literacy rate is \nSelect and explain. \nA. Population above 7 years, B. Population above 14 years, C. Entire population, D. Per 1000 population', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]