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
Which of the following is excreted in saliva? 
Select and explain. 
A. Chloramphenicol, B. Ampicillin, C. Lithium, D. Tetracycline
C: Lithium
Answer: C: Lithium 
Explanation: .