Q.

The IUPAC name for the following compound is:

1 2,5-dimethyl-5-carboxy-hex-3-enal  
2 2,5-dimethyl-6-carboxy-hex-3-enal  
3 2,5-dimethyl-6-oxo-hex-3-enoic acid  
4 6-formyl-2-methyl-hex-3-enoic acid  

Ans.

(3)

Conceptual