The following are multiple choice questions (with answers) about medical knowledge.   **Question:** About gutta-percha all are true, except:   (A) It contains 60-70% gutta-percha and 20% ZnO   (B) Can be sterilized by heating   (C) With time they become brittle   (D) It has two forms α and β
['(B) Can be sterilized by heating <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) It contains 60-70% gutta-percha and 20% ZnO \n (B) Can be sterilized by heating \n (C) With time they become brittle \n (D) It has two forms α and β <> possible answers', '  About gutta-percha all are true, except: <> context@']