The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Empty Thecal sac sign in:   (A) Arachnoiditis   (B) Tethered Cord syndrome   (C) Veebral osteomyelitis   (D) Discitis
['(A) Arachnoiditis <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Arachnoiditis \n (B) Tethered Cord syndrome \n (C) Veebral osteomyelitis \n (D) Discitis <> possible answers', '  Empty Thecal sac sign in: <> context@']