You know of the dual intent. You applied for permanent residency, that is true and so that is the precise reason you won't overstay because you don't want to jeopardize your PR application by overstaying your temporary work permit. Be honest. As omollo said, don't bring it out if they did not ask. Only answer questions direct to the point. When asked to elaborate then that's when you elaborate or explain, otherwise when the question merits a simple yes or no question then answer with either a yes or no. I hope you answered question 19e in the positive and gave an explanation on the pertinent area.