The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Number of vision centers under vision 2020, a national program for control of blindness are -   (A) 20   (B) 200   (C) 2000   (D) 20000
['(D) 20000 <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 20 \n (B) 200 \n (C) 2000 \n (D) 20000 <> possible answers', '  Number of vision centers under vision 2020, a national program for control of blindness are - <> context@']