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': 'Recommended illumination range for regular work is _______ foot-candles \nSelect and explain. \nA. 25-50, B. 12-Jun, C. 50-75, D. 75-100', 'role': 'user'}, {'content': 'Answer: B \nExplanation: • Basic minimum illumination for satisfactory vision: 15 – 20 foot candles', 'role': 'assistant'}]