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Solution


Q.

What is the correct IUPAC name of                   [2025]
1 4-Ethyl-1-hydroxycyclopent-2-ene  
2 1-Ethyl-3-hydroxycyclopent-2-ene  
3 1-Ethylcyclopent-2-en-3-ol  
4 4-Ethylcyclopent-2-en-1-ol  

Ans.

(4)

Priority order of giving lowest locants is: functional group > double bond > substituents