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IUPAC name of CH(3)-underset(CH(3))under...

IUPAC name of `CH_(3)-underset(CH_(3))underset(|)C=CH-underset(O)underset(||)C-CH_(3)` is

A

4-methylpent-3-en-2-one

B

2-Methylpent-3-en-2-one

C

3-Methylpent-2-en-1-one

D

none of these.

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The correct Answer is:
A
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