Task: Question Answering
Input (English): Question: 3 of the 4 expressions (1), (2), (3) & (4) given below are exactly equal . Which of the expression is not equal to the other four expressions?

 Option A: (A + B

 Option B: (A – B

 Option C: A2 + B2 - 4AB + 2AB

 Option D: A2 – B2 + 2B(B – A

 Option E: None of these
Output (English): Option B