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
All are anti craving agent for alcohol except: 
Select and explain. 
A. Lorazepam, B. Naltrexone, C. Topiramate, D. Acamprosate
A: Lorazepam
Answer: A: Lorazepam 
Explanation: A. i.e. Lorazepam