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
Prophylactic maintenance serum level of lihium is 
Select and explain. 
A. 0.2 - 0.8 meq/L, B. 0.7 -1.2 meq/L, C. 1.2 - 2.0 meq/L, D. 1.2 - 2.0 meq/L
B: 0.7 -1.2 meq/L
Answer: B: 0.7 -1.2 meq/L 
Explanation: B i.e. 0.7 - 1.2 meq/L