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': 'Day light factor in living room should be ? \nSelect and explain. \nA. 8%, B. 6%, C. 10%, D. 15%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]