If y ≠ 3 and 2x/y is a prime integer greater than 2, which of the following must be true?
I. x = y
II. y = 1
III. x and y are prime integers.
Choices
A) None B) I only C) II only D) III only E) I and II
given 2x/y is prime and greater than 2.   =&gt; 2x/y could be any of the following   3,5,7....   =&gt; 2x/y is odd and prime (as 2 is the only even prime number and its not in this set)   1. x = y , can't be true   if x=y , 2x/y = 2 which is not odd and prime.   2. y=1. can't be true.   if y=1,2x/y = 2x = even which is not odd &amp; prime.   3. x and y are prime integers, need not be true.   lets say 2x/y = 3 and say y=2 prime   =&gt;x = 6/2= 
<gadget id="calculator">6/2</gadget>
<output>3</output>
3 prime   satisfies the given condition here.   but when 2x/y= 3 and y=5 prime   =&gt; x = 15/2 not prime   My Nonenswer is None
<result>A</result>
If y ≠ 3 and 2x/y is a prime integer greater than 2, which of the following must be true?
I. x = y
II. y = 1
III. x and y are prime integers.