यदि $f(x)=\int \frac{x^2 \, dx}{(1+x^2)(1+\sqrt{1+x^2})}$ और $f(0)=0$ है,तो $f(1)$ का मान ज्ञात कीजिए।

  • A
    $\log (1+\sqrt{2})$
  • B
    $\log (1+\sqrt{2})-\frac{\pi}{4}$
  • C
    $\log (1+\sqrt{2})+\frac{\pi}{4}$
  • D
    $\log (1-\sqrt{2})$

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