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
Anticraving agent which acts as NMDA antagonist is 
Select and explain. 
A. Naltrexone, B. Acamprosate, C. Baclofen, D. Topiramate
B: Acamprosate
Answer: B: Acamprosate 
Explanation: Anticraving drugs used to treat alcohol abuse

Acamprosate: NMDA blocker
Naltrexone: Opioid antagonist.