The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Highest concentration of oxygen is delivered through?   (A) Nasal cannula   (B) Venturi mask   (C) Bag and mask   (D) Mask with reservoir
['(C) Bag and mask <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Nasal cannula \n (B) Venturi mask \n (C) Bag and mask \n (D) Mask with reservoir <> possible answers', '  Highest concentration of oxygen is delivered through? <> context@']