The following are multiple choice questions (with answers) about medical knowledge.   **Question:** What is the angle subtended by the largest letter in the Snellen cha on a person's eye who is reading it from a distance of 6 meters?   (A) 1 minute   (B) 10 minutes   (C) 50 minutes   (D) 60 minutes
['(C) 50 minutes <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 1 minute \n (B) 10 minutes \n (C) 50 minutes \n (D) 60 minutes <> possible answers', "  What is the angle subtended by the largest letter in the Snellen cha on a person's eye who is reading it from a distance of 6 meters? <> context@"]