Disk partition manager
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diskpartition
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diskpart
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diskpartition.msc
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diskpartition.cpl
diskpart is the correct Windows command-line disk partition management utility. Option A is close but not the actual command, C incorrectly uses Microsoft Management Console (.msc) syntax which doesn't apply here, and D incorrectly uses Control Panel (.cpl) extension. The diskpart command is used for partition operations.
Correct answer: diskpart. diskpart is the Windows command-line disk partitioning utility used to create, delete, resize, and manage disk partitions and volumes. 'diskpartition', 'diskpartition.msc', and 'diskpartition.cpl' are not real Windows executables/consoles — the .msc and .cpl suffixes are plausible-looking but fabricated distractors mimicking real Windows tool naming conventions (Microsoft Management Console snap-ins and Control Panel applets, respectively).