Which of the following IUPAC name of the molecule is not correct?

1.	Which of the following IUPAC name of the molecule is not correct?
Answer» `UNDERSET("4-methylpent-2-ene")(CH_(2)=CH-CH_(2)-underset(underset(CH_(3))(\|))(CH)-CH_(3))` `underset("Pent-4-ene-2-amine")(CH_(2)=CH-CH_(2) underset(underset(NH_(2))(\|))(CH)-CH_(3))` `underset("Pent-1-ene-4-ol")(CH_(2)=CH-CH_(2)- underset(underset(OH)(\|))(CH)-CH_(3))` `underset("Pent-4-ene-2-one")(CH_(2)=CH-CH_(2)-underset(underset(O)(\|\|))(C )-CH_(3))` ANSWER :C

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