I just started my GMAT preparation and this is my first post. So please correct/guide me if I am being wrong
I think, for this kind of questions, you just have to substitute some random numbers and test the given statements. By picking X=31, and Y=41, XY=1271; the given condition becomes False. But, if you pick X=61, and Y=61, XY=3721; the condition becomes True.
So the answer is E. Always be careful while picking up the numbers and do bunch of iterations and also keep your eye on the clock.