The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The function of a sprue is to   (A) Form an opening for molten metal to enter the mold   (B) Help polish cast restorations   (C) Eliminate air bubbles on the wax pattern   (D) Reproduce fine detail
['(A) Form an opening for molten metal to enter the mold <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Form an opening for molten metal to enter the mold \n (B) Help polish cast restorations \n (C) Eliminate air bubbles on the wax pattern \n (D) Reproduce fine detail <> possible answers', '  The function of a sprue is to <> context@']