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
In alcohol withdrawal, drug of choice is: REPEAT 
Select and explain. 
A. TFP, B. Chlormethazole, C. Chlordiazepoxide, D. Buspirone
C: Chlordiazepoxide
Answer: C: Chlordiazepoxide 
Explanation: Essentials of medical pharmacology ;k.d tripathi ; 7th edition; pg.no. 393 ; 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.