Sounds to me like a CFI is overly impressed with himself....and that question definitely falls into the catagory of.....Who gives a rats hind end!
But then while doing the UK ATPL I discovered there were loads of questions like that.....nifty info for those foggy mornings when the crew room was chock a block with tea drinkers waiting for the duty time window to run out....but having no merit other than that.