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

5-oxo-4-hydroxy-2-pentanone

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4-hydroxy-5-al-2-pentanone

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2-Hydroxy-4-oxopentanal

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1-al-4-oxo-2-pentanol

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Solution

The correct option is D 2-Hydroxy-4-oxopentanal
Three functional groups are present in the given compound. Priority will be given to $- C H O$ group. Therefore, numbering will start from the aldehyde group carbon. Hydroxy will get number 2 and oxo group will get number 4.

Hence, the IUPAC name is 2-Hydroxy-4-oxopentanal.

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The IUPAC name of CH₂=CHCHOH-CH₂CHO is:

C H_{2} - C H - C O O H ∣ ∣ O H N H_{2}

C H_{3} - C H B r - C H_{2} O H

Structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is:

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