Which of the following CANNOT be a product of two distinct positive integers X and Y?	Choose the correct option
A) X	B) Y	C) 3Y + 2X	D) Y - X	E) YX
In these questions it is best to take an example as if something is true for all positive integers than it as to be true for the smallest and the easiest integers to work with   take X = 1 and Y = 2 and work with the options   XY = 2   A) X take X =2, Y = 1   B) Y take X = 1 Y = 2   C) 3Y + 2X Seems tricky, lets see other options and then come back to it.   D) Y - X take Y = 1 and X = 2 --&gt; Y - X = -1 .. How the hell can product of two positive integers be negative ?? or less than each of them?   E) YX Always true   You don't even have to worry what C is !   ans Y - X
<result>D</result>
Which of the following CANNOT be a product of two distinct positive integers X and Y?