Q.

The IUPAC name of the following compound is:                       [2025]

1 6-Methoxycarbonyl-2,5-dimethylhexanoic acid.  
2 2-Carboxy-5-methoxycarbonylhexane.  
3 Methyl-6-carboxy-2,5-dimethylhexanoate.  
4 Methyl-5-carboxy-2-methylhexanoate.  

Ans.

(1)