This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Which of the following is excreted in saliva? \nSelect and explain. \nA. Chloramphenicol, B. Ampicillin, C. Lithium, D. Tetracycline', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]