Which command is used to set a name to a disk in DOS?

Answer: Option C

To set a name to a disk in DOS, the correct command is VOL. Here's the explanation for each option:
Option A: VOLUME is not the correct command in DOS to set a name to a disk.
Option B: VOL is used to display the disk volume label in DOS, not to set or change it.
Option C: LABEL is the correct command in DOS used to set or change the disk volume label. This command allows you to assign a name to a disk.
Option D: DISKLABEL is not a valid command in DOS.

Therefore, while Option C (LABEL) accurately describes the command used to set a name to a disk in DOS, Option B (VOL) specifically displays the current disk volume label and does not set or change it.