This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
[{'content': 'Which of the following is excreted in saliva \nSelect and explain. \nA. Tetracyclines, B. Ampicilline, C. Lithium, D. Chloramphenicol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (Lithium) (416-670 KDT) (435-KDT 6th)LITHIUM - is excreted in sweat and saliva also salivary concentration is proportional to serum concentration and may be usedfor non invasive monitoring* Lithium is excreted in breast milk, Mothers on lithium should not breast feed (416 - KDT)Tetracyclines - are concentrated in liver spleen and bind to the connective tissue in bones and joint* They are secreted in milk in amounts sufficient to affect the suckling infants', 'role': 'assistant'}]