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
Therapeutic levels of lithium (in mecill) in a patient of acute mania is: 
Select and explain. 
A. 0.4–0.8, B. 0.8–1.2, C. 1.2–1.6, D. 1.6–2.0
B: 0.8–1.2
Answer: B: 0.8–1.2 
Explanation: None