This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'Which is more in stimulated saliva as compared to unstimulated saliva? \nSelect and explain. \nA. CI, B. K, C. Hydrogen, D. HCO3', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]