This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Community Ophthalmology, Subject name: Ophthalmology
[{'content': 'Economic blindness is defined as: \nSelect and explain. \nA. Vision < 6/60 to 3/60, B. Vision < 3/60 to 1/60, C. Vision < 1/60 to Finger counting, D. No PL', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Economic Blindness: Vision < 6/60 to 3/60 Definitions:- * Economic Blindness: < 6/60-3/60 * Social Blindness < 3/60- 1/60 * Legal Blindness < 1/60 to perception of light', 'role': 'assistant'}]