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
Drug used to prevent alcohol withdrawal in de addiction is? 
Select and explain. 
A. Diazepam, B. Clonidine, C. Propanolol, D. Methadone
A: Diazepam
Answer: A: Diazepam 
Explanation: Psychological & medical suppoive measures are needed during withdrawal .Many CNS depressant like barbiturates ,phenothiazines ,chloral hydrate have been used as substitution therapy in past (to suppress withdrawal syndrome) but benzodiazepine (chordiazepoxide ,diazepam ) are preferred drugs now. Ref: KD Tripathi 8th ed.