The deleted file in MS-DOS can be recovered if you use the command mention below immediately, the command is:

In MS-DOS, if you want to recover a recently deleted file, you can use the command Option C: UNDELETE. This command allows you to recover files that have been recently deleted from the disk, provided they have not been overwritten by other data.

Option A, "DO NOT DELETE," and Option B, "NO DELETE," are not valid commands in MS-DOS.
Option D, "ONDELETE," is not a command in MS-DOS for recovering deleted files.

Therefore, the correct answer is Option C: UNDELETE.