This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Histaminics, Subject name: Pharmacology
Specific inhibitor of alcohol dehydrogenase - 
Select and explain. 
A. Disulfiram, B. Fomepizole, C. Methyl alcohol, D. Zolpidem
B: Fomepizole
Answer: B: Fomepizole 
Explanation: Ans. is 'b' i.e., Fomepizole o Fomepizole (4-methylpyrazole) is a specific inhibitor of alcohol dehydrogenase and the drug of choice for methanol poisoning.Noteo Disulfiram also inhibits alcohol dehydrogenase, but it is non-specific inhibitor. Its main action is due to inhibition of aldehyde dehydrogenase.