The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which one of the following is most elastic?   (A) α titanium   (B) β titanium   (C) Chrome-cobalt-nickel   (D) Nickel titanium
['(D) Nickel titanium <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) α titanium \n (B) β titanium \n (C) Chrome-cobalt-nickel \n (D) Nickel titanium <> possible answers', '  Which one of the following is most elastic? <> context@']