The following are multiple choice questions (with answers) about medical knowledge.   **Question:** For measuring hardness of Co-Cr alloy, which hardness test is used?   (A) Vicat apparatus   (B) Cold bend   (C) Heat and cold bend   (D) Rockwell hardness test
['(D) Rockwell hardness test <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Vicat apparatus \n (B) Cold bend \n (C) Heat and cold bend \n (D) Rockwell hardness test <> possible answers', '  For measuring hardness of Co-Cr alloy, which hardness test is used? <> context@']