The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Occlusal isthmus of a M.O. dental amalgam is resistant to fracture if:   (A) Pulpal floor depth is 1mm   (B) Dove tail is present   (C) Axiopulpal line angle is rounded   (D) Unsupported enamel at the gingival cavosurface margin is planed
['(C) Axiopulpal line angle is rounded <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Pulpal floor depth is 1mm \n (B) Dove tail is present \n (C) Axiopulpal line angle is rounded \n (D) Unsupported enamel at the gingival cavosurface margin is planed <> possible answers', '  Occlusal isthmus of a M.O. dental amalgam is resistant to fracture if: <> context@']