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
A drug having narrow therapeutic range is 
Select and explain. 
A. Lithium, B. Sertraline, C. Reboxetine, D. Dothiepin
A: Lithium
Answer: A: Lithium 
Explanation: Therapeutic range is bounded by the dose which produces a minimal therapeutic effect and the dose which produces a maximal acceptable adverse effect.
Example of the narrow therapeutic range are lithium, Phenytoin.