Which nomenclature is not according to IUPAC system ?

1.	Which nomenclature is not according to IUPAC system ?
Answer» `UNDERSET("4-Bromo,2,4-di-methylhexane")(CH_(3) - CH_(2) - undersetunderset(BR)(\|)oversetoverset(CH_(3))(\|)CH - CH_(2) - undersetunderset(CH_(3))(\|)CHCH)` `underset("5-Oxohexanoic acid") (CH_(3) - undersetunderset(O)("\|\|")C - CH_(2) - CH - CHCOOH)` `underset("1-Bromo-prop-2-ene")(Br-CH_(2) - CH = CH_(2))` Answer :D

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