The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following is a schedule X drug?   (A) Thalidomide   (B) Colistin   (C) Ketamine   (D) Halothane
['(C) Ketamine <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Thalidomide \n (B) Colistin \n (C) Ketamine \n (D) Halothane <> possible answers', '  Which of the following is a schedule X drug? <> context@']