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: Psychiatry
The prophylactic blood level of Lithium is 
Select and explain. 
A. 0.3 mEq/L, B. 0.6 mEq/L, C. 0.9 mEq/L, D. 1.2 mEq/L
B: 0.6 mEq/L
Answer: B: 0.6 mEq/L 
Explanation: The prophylactic blood level of Lithium is 0.5 - 0.8 mEq/L.