यदि $u+iv = \frac{3i}{x+iy+2}$ है,तो $y=$

  • A
    $\frac{9u}{u^2+v^2}$
  • B
    $\frac{3u}{u^2+v^2}$
  • C
    $\frac{6u}{u^2+v^2}$
  • D
    $\frac{12u}{u^2+v^2}$

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