The IUPAC name of this compound is:
$C H_{3} - C H_{3} | C H - O | | C - C H_{2} - C H_{2} O H$

1-Hydroxy-4-methyl-3-pentanone

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2-Methyl-5-hydroxy-3-pentanone

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4-Methyl-3-oxo-1-pentanol

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Hexan-1-one-3-ol

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Solution

The correct option is A 1-Hydroxy-4-methyl-3-pentanone
The parent functional group will be ketone as it has higher priority than alcohol.

So the keto group should get lowest number but from both side that carbon gets 3rd number.

The numbering starts from carbon attached to $- O H$ group.

Therefore, IUPAC name is 1-Hydroxy-4-methyl-3-pentanone.

Option A is correct.

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