Q.

The correct IUPAC nomenclature for the following compound is:             [2023]

1 5-Methyl-2-oxohexan-6-oic acid  
2 5-Formyl-2-methylhexanoic acid  
3 2-Methyl-5-oxohexanoic acid  
4 2-Formyl-5-methylhexan-6-oic acid  

Ans.

(3)