The following are multiple choice questions (with answers) about medical knowledge.   **Question:** HTR polymer is   (A) Polyether   (B) Polytmethymethacrylate   (C) Silica   (D) Hydroxyapatite
['(B) Polytmethymethacrylate <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Polyether \n (B) Polytmethymethacrylate \n (C) Silica \n (D) Hydroxyapatite <> possible answers', '  HTR polymer is <> context@']