If the system of equations,$a^2 x - ay = 1 - a$ and $bx + (3 - 2b) y = 3 + a$ possess a unique solution $x = 1, y = 1$,then:

  • A
    $a = 1, b = -1$
  • B
    $a = -1, b = 1$
  • C
    $a = 0, b = 0$
  • D
    None of these

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