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
Ethanol is given in methyl alcohol poisoning because: 
Select and explain. 
A. It inhibit alcohol dehydrogenase, B. It inhibit aldehyde synthetase, C. It binds 100 times stronger than methanol, D. None
A: It inhibit alcohol dehydrogenase
Answer: A: It inhibit alcohol dehydrogenase 
Explanation: Ethanol is preferentially metabolised by alcohol dehydrogenase over methanol.At a concenteration 100mg/DL in blood it saturates alcohol dehydrogenase over methanol &retads methanol metabolism. This reduces formation of formaldehyde & formic acid. Ref KD Tripathi 8th ed.