यदि $\tan ^{-1} \frac{x-1}{x-2}+\tan ^{-1} \frac{x+1}{x+2}=\frac{\pi}{4}$ है,तो $x$ का मान ज्ञात कीजिए।

  • A
    $\pm \frac{1}{\sqrt{3}}$
  • B
    $\pm \frac{1}{\sqrt{2}}$
  • C
    $\pm \frac{1}{2}$
  • D
    $\pm \frac{\sqrt{3}}{2}$

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