The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following drugs can be given in renal failure safely?   (A) Saxagliptin   (B) Linagliptin   (C) Vildagliptin   (D) Sitagliptin
['(B) Linagliptin <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Saxagliptin \n (B) Linagliptin \n (C) Vildagliptin \n (D) Sitagliptin <> possible answers', '  Which of the following drugs can be given in renal failure safely? <> context@']