This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Other than cataract, which one among the following is the highest prevalent cause of blindness in the world - \nSelect and explain. \nA. Corneal opacity, B. Diabetic retinopathy, C. Glaucoma, D. Trachoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cataract 39% Glaucoma 10% tracoma3% diabeticretinopathy 4% Ref-Park&;s textbook of Preventive and social medicine 23rd edition. .', 'role': 'assistant'}]