If the equation $x^2 + \lambda x + \mu = 0$ has equal roots and one root of the equation $x^2 + \lambda x - 12 = 0$ is $2$,then $(\lambda, \mu) = $

  • A
    $(4, 4)$
  • B
    $(-4, 4)$
  • C
    $(4, -4)$
  • D
    $(-4, -4)$

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