1-hydroxypentane-1, 4-dione
4-oxopentanoic acid
Correct Answer: 4-oxopentanoic acid
Explanation:
The compound described has a five-carbon chain (pentanoic acid) with a ketone group (=O) on the 4th carbon.
• The parent chain is a carboxylic acid, so the suffix is -oic acid.
• The ketone (=O) at position 4 is indicated by the prefix oxo.
Hence, the correct IUPAC name is 4-oxopentanoic acid.