Really? I haven't come across that question though. However I do not have to deny it, I'll respond truthfully and state the reason which is that Nigerians got visa ban in Dubai, hence no visa was been approvedFor PR application, there is a question that asks whether you have stayed illegally or overstayed in any country. If you reply No to this question, then you will be doing misrepresentation.
Besides the rejecton of the applcation, applicants with misrepresentation receive a five-year ban from entering Canada.