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People pointing answers C and D are not creating the directory with the leading \. To do that you need do use mkdir "\dir" since mkdir \dir will create a directory named only "dir". Thats why C and D are working for them.
Correct answer is A.
I think rhat C and D...
on this cases... works the remove directory
$ mkdir dir
$ ls dir
$ ls d*
dexample.gz.tar
dir:
rmdir ~/\dir
$ ls d*
dexample.gz.tar
$ mkdir dir
sblanco@idp:~$ rmdir ~/'dir'
sblanco@idp:~$ ls d*
dexample.gz.tar
$ mkdir dir
$ rmdir ~/'dir'
$ ls d*
dexample.gz.tar
A: seen as correct in another guide and tested in my home directory as regular user, cemtos 7, not root:
mkdir "\dir"
ls -l
\dir
then tried the different deleting options and the only working was A, no need to use any quotation marks.
basically, you can create \dir directory in homedir using 'mkdir ~/\\dir'
That's why answer is A that using the same way to remove it.
Note: backslash "\" used to remove special meaning on the following character, Example:
\x will display x as string even though x has a special meaning.
I tested on "CentOS Linux release 8.2.2004 (Core)", The answer is A(rmdir ~/\\dir).
Others' results are same as "No such file or directory".
but, if you run "rmdir ~/'\dir'", it will be removed successfully.
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