The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following instruments are more efficient?   (A) Stainless steel   (B) Carbon steel   (C) Both have equal efficacy   (D) None
['(B) Carbon steel <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Stainless steel \n (B) Carbon steel \n (C) Both have equal efficacy \n (D) None <> possible answers', '  Which of the following instruments are more efficient? <> context@']