Q.

The correct IUPAC nomenclature for the following compound is

1 2-methyl-5-oxo hexanoic acid  
2 5-formyl-2-methyl hexanoic acid  
3 2-Formyl-5-methyl hexan-6-oic acid  
4 5-methyl-2-oxo hexan-6-oic acid  

Ans.

(1)

2-methyl-5-oxo hexanoic acid