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: Pharmacology
Half–life of lithium is: 
Select and explain. 
A. 8 hours, B. 16 hours, C. 24 hours, D. 36 hours
C: 24 hours
Answer: C: 24 hours 
Explanation: None