input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** In which of the following case Hamman's sign is seen?   (A) Hematoma   (B) Accidental  NaOCl   (C) Pneumomediastinitis   (D) Oral carcinoma
output: ['(C) Pneumomediastinitis <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Hematoma  (B) Accidental  NaOCl  (C) Pneumomediastinitis  (D) Oral carcinoma <> possible answers', "  In which of the following case Hamman's sign is seen? <> context"]