If the middle points of the sides $BC,\, CA$ and $AB$ of the triangle $ABC$ be $(1, 3), \,(5, 7)$ and $(-5, 7)$, then the equation of the side $AB$ is

  • A

    $x - y - 2 = 0$

  • B

    $x - y + 12 = 0$

  • C

    $x + y - 12 = 0$

  • D

    None of these

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