input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The ETDRS cha is used for visual evaluation in diabetic patients. What does ETDRS stand for   (A) Extended treatment for diabetic retinopathy study   (B) Early treatment for diabetic retinopathy study   (C) Emergency treatment for diabetic retinopathy study   (D) Emerging treatment for diabetic retinopathy study
output: ['(B) Early treatment for diabetic retinopathy study <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Extended treatment for diabetic retinopathy study  (B) Early treatment for diabetic retinopathy study  (C) Emergency treatment for diabetic retinopathy study  (D) Emerging treatment for diabetic retinopathy study <> possible answers', '  The ETDRS cha is used for visual evaluation in diabetic patients. What does ETDRS stand for <> context']