The IUPAC name of HOCH\(_2\)(CH\(_2\))\(_3\)CH\(_2\)COCH\(_3\) is
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When naming organic compounds, identify the functional groups (like alcohol and ketone) and number the carbon chain based on the position of these groups.
The given structure HOCH\(_2\)(CH\(_2\))\(_3\)CH\(_2\)COCH\(_3\) has a hydroxyl group at position 7 and a ketone group at position 2 on the 7-carbon chain. Therefore, the IUPAC name is 7-hydroxyheptan-2-one. Thus, the correct answer is (B).