If $a$ and $b$ are real numbers between $0$ and $1$ such that the points $z_1 = a + i$,$z_2 = 1 + bi$,and $z_3 = 0$ form an equilateral triangle,then

  • A
    $a = b = 2 + \sqrt{3}$
  • B
    $a = b = 2 - \sqrt{3}$
  • C
    $a = 2 - \sqrt{3}, b = 2 + \sqrt{3}$
  • D
    None of these

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