What was the question for this implicit rationale, and corresponding answer?
Other parts are equal to
2x2 + y2 3xy.
The answer: (B)
The question: Four of the following five parts numbered (a), (b), (c), (d) and (e) are exactly equal. The number of the part which is not equal to the other four parts is your answer.
Options:
(A) 2x2 3xy + y2
(B) (2x + y) (x y)
(C) (x y) 2 + x(x y)
(D) (2x y) 2 x(2x y)
(E) (2x y) 2 2x2 + xy