This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NPCBVI, NACP, Subject name: Social & Preventive Medicine
[{'content': 'Vision 2020 - The Right to Sight do not include :- \nSelect and explain. \nA. Centres for Vision - 20, B. Training Centres - 200, C. Service Centres - 2000, D. Vision Centres - 20,000', 'role': 'user'}, {'content': 'Answer: A \nExplanation: VISION 2020: The Right to Sight- was launched in 1999 - Centres of excellence-20 - Training centres-200 - Service centres-2000 - Vision centres-20,000 - Main aim of vision-2020 is to eliminate all causes of avoidable blindness, i.e Preventable blindness - Vit A deficiency , trachoma Curable blindness - cataract', 'role': 'assistant'}]