નિશ્ચિત સંકલન $\int_{0}^{1} \frac{d x}{1+x^{2}}$ ની કિંમત શોધો.

  • A
    $\frac{\pi}{4}$
  • B
    $\frac{\pi}{2}$
  • C
    $\frac{\pi}{6}$
  • D
    $\pi$

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