The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Incomplete casting is the result of   (A) More porous investment in the mold   (B) Narrow sprue diameter   (C) Hollow sprue pin   (D) Large reservoir
['(B) Narrow sprue diameter <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) More porous investment in the mold \n (B) Narrow sprue diameter \n (C) Hollow sprue pin \n (D) Large reservoir <> possible answers', '  Incomplete casting is the result of <> context@']