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
Opiate withdrawal is treated with - 
Select and explain. 
A. CPZ, B. Nalorphine, C. Pethidine, D. Methadone
D: Methadone
Answer: D: Methadone 
Explanation: Treatment of opioid (Morphine or heroin) withdrawal (detoxification):- Methadone is the DOC. Alternatives are clonidine, clonidine with naltrexone with or without BZDs, Lofexidine, dextropropoxyphene, diphenoxylate.