यदि $y=\log \left[\tan \sqrt{\frac{2^x-1}{2^x+1}}\right], x>0$ है, तो $\left(\frac{d y}{d x}\right)_{x=1}=$

  • A
    $\frac{4 \sqrt{2} \log 2}{9 \sin \left(\frac{2}{\sqrt{3}}\right)}$
  • B
    $\frac{4 \sqrt{3} \log 2}{9 \sin \left(\frac{\sqrt{3}}{2}\right)}$
  • C
    $\frac{4 \sqrt{3} \log 2}{9 \sin \left(\frac{2}{\sqrt{3}}\right)}$
  • D
    $\frac{4 \sqrt{2} \log 2}{9 \sin \left(\frac{\sqrt{3}}{2}\right)}$

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