Which of the following names is correct?

Which of the following name is correct :-

Which of the following name is correct :-

Which of the following names are correct for the compound : CH_(3)-overset(O)overset(||)(C)-CH_(2)-COOH

Which of the following names are correct for the compound : CH_(3)-overset(O)overset(||)(C)-CH_(2)-COOH

Which of the following names are correct for the compound? CH_3-overset(O)overset(||)C-CH_2-COOH

Which of the following names are correct for underset(CHO)underset(|)(CH_(2))-underset(CHO)underset(|)(CH)-underset(CHO)underset(|)(CH_(2))

Which of the following names are correct for the compound? HOOC-CH_2-CH_2-overset(COOH)overset(|)CH-CH_2-COOH

Which of the following names is not correct for the corresponding complex according to IUPAC system ?