This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharmacotherapy in psychiatry, Subject name: Psychiatry
Normal therapeutic level of Lithium level is 
Select and explain. 
A. 0.5 to 0.7 mEq/litre, B. 0.7 to 1.1 mEq/litre, C. 0.1 to 0.3 mEq/litre, D. 1.5 to 2 mEq/litre
B: 0.7 to 1.1 mEq/litre
Answer: B: 0.7 to 1.1 mEq/litre 
Explanation: Blood Lithium Levels (in treatment of bipolar disorder)* Therapeutic levels = 0.6-1.2 mEq/L (For the treatment of acute mania)* Prophylactic levels = 0.6-1.0 mEq/L (For relapse prevention in bipolar disorder)* Toxic lithium levels > 2.0 mEq/L Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no.190