input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Scaphoid fracture at waist with retrograde blood supply. Which segment is most susceptible to avascular necrosis?   (A) Proximal   (B) Distal   (C) Middle   (D) Scaphoid tubercle
output: ['(A) Proximal <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Proximal  (B) Distal  (C) Middle  (D) Scaphoid tubercle <> possible answers', '  Scaphoid fracture at waist with retrograde blood supply. Which segment is most susceptible to avascular necrosis? <> context']