यदि $|x+iy|=\sqrt{x^2+y^2}$ है,तो $|(1-\sqrt{3}i)^9+(\sqrt{3}+i)^9|=$

  • A
    $2^9$
  • B
    $2^{18}$
  • C
    $2^{10}$
  • D
    $2^{\frac{19}{2}}$

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