3 - Carboxypentane का IUPAC के अनुसार सही कीजिए ?

Explanation

`C-C-underset(COOH)underset|C-C-C" "underset("2-Ethylbutanoic acid")(CH_3-CH_2-underset(COOH)underset(1|)overset2(CH)-overset3(CH_2)-overset4(CH_3))`