The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Acid neutralizing substance in saliva   (A) NH3   (B) Carbonate   (C) Bicarbonate   (D) Chlorides
['(C) Bicarbonate <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) NH3 \n (B) Carbonate \n (C) Bicarbonate \n (D) Chlorides <> possible answers', '  Acid neutralizing substance in saliva <> context@']