input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Dead bone appears on a radiograph as:   (A) Radiolucent   (B) Radio-opaque   (C) Cotton wool appearance   (D) Salt and pepper appearance
output: ['(B) Radio-opaque <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Radiolucent  (B) Radio-opaque  (C) Cotton wool appearance  (D) Salt and pepper appearance <> possible answers', '  Dead bone appears on a radiograph as: <> context']