The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The highest critical surface tension is for which of the orthodontic brackets?   (A) Stainless steel   (B) Polycarbonate   (C) Ceramic alumina   (D) Titanium
['(A) Stainless steel <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Stainless steel \n (B) Polycarbonate \n (C) Ceramic alumina \n (D) Titanium <> possible answers', '  The highest critical surface tension is for which of the orthodontic brackets? <> context@']