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': 'Under the National Programme for Control of Blindness, the goal is to reduce the prevalence of blindness to a level of - \nSelect and explain. \nA. 0.10%, B. 0.31%, C. 0.50%, D. 1%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: To reduce prevalence of blindness in population from 1.38% to 0.31% by 2000. Ref- Park&;s textbook of Preventive and social medicine 24th edition. .', 'role': 'assistant'}]