If a Ã— b = 2a - 3b + ab, then 1 Ã— 2 + 2 Ã— 1 is equal to :	Select the correct option:
A) 1 B) 2 C) 3 D) 4 E) 5

Rationale: explanation : 1 ã — 2 + 2 ã — 1 = ( 2 ã — 1 - 3 ã — 2 + 1 ã — 2 ) + ( 2 ã — 2 - 3 ã — 1 + 2 ã — 1 ) = ( 2 - 6 + 2 + 4 - 3 + 2 ) = 1 . answer : a
Answer: A