This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
Which of the following is an anxiolytic drug? 
Select and explain. 
A. Lithium, B. Oxazepam, C. Desipramine, D. Chlorpromazine
B: Oxazepam
Answer: B: Oxazepam 
Explanation: Oxazepam is a benzodiazepine-anxiolytic. lithium is a mood stabiliser. Ref: Goodman Gillman 12th ed. Pg: 465