I am going to apply for my citizenship. In section 10.b of the application form it is asked if I have been outside of Canada during last 4 years, I should provide a police certificate. I came to Canada 3 years ago and since my landing I haven't been out of Canada for more than 180 days. But the explanation is not clear enough as I was back home four year ago.(one year before my landing) I do not know if I should provide a police certificate.