यदि $f(x) = \int \frac{x^2 + \sin^2 x}{1 + x^2} \cdot \sec^2 x \, dx$ और $f(0) = 0$ है,तो $f(1) = $

  • A
    $\frac{\pi}{4} - 1$
  • B
    $\tan 1 + \frac{\pi}{4}$
  • C
    $1 - \frac{\pi}{4}$
  • D
    $\tan 1 - \frac{\pi}{4}$

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