The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following alloys has the highest surface roughness?   (A) Stainless steel   (B) Elgiloy   (C) NiTi   (D) TMA
['(C) NiTi <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Stainless steel \n (B) Elgiloy \n (C) NiTi \n (D) TMA <> possible answers', '  Which of the following alloys has the highest surface roughness? <> context@']