This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, 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: park's textbook of preventive and social medicine 23rd edition. *daylight factor is the ratio of illumination at a given point to illumination at a point exposed simultaneously to the whole hemisphere of the sky excluding direct sunlight * it is recommended that in living room D.F. should be atleast 8%and in kichen about 10%.", 'role': 'assistant'}]