Question 9 only determines the country where application will be processed by answering yes or no . I understand that by choosing Pakistan it will still come to Abu dhabi office but since you have stated in question 7 that you are a pakistani citizen then it shouldn't be a problem and more weight will be accorded to your ties to home country. See it this way, as a VO this how I think ; in case you get into any trouble ( God forbid )in Canada and have to be deported, will you be deported to UAE or Pakistan ? In your SOP (assuming they are not using chinook) talk about employment prospects, property, family ties relating to Pakistan. if possible also get a provisional job offer letter from Pakistan and explain in SOP . Every application is treated on its own merit so dont worry about previous refusals