There appears to be a mistake in one of the quiz answers. This is in the RH124 material for RHEL 8, Chapter 3, section 4
The second option is cd.. -- which is not a Linux command (works in Windows, though). Now, with this question, it is also NOT the correct answer.
Even so, cd.. does not appear in any of the other questions. The correct form, cd .. (with the space), does.
Thanks @Tracy_Baker I will let the team know about this issue
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