$f(x) = \sin^{-1} (\sqrt{x^2 + x + 1})$ का परिसर (range) है -

  • A
    $\left[ 0, \frac{\pi}{6} \right]$
  • B
    $\left[ \frac{\pi}{6}, \frac{\pi}{4} \right]$
  • C
    $\left[ \frac{\pi}{4}, \frac{\pi}{3} \right]$
  • D
    $\left[ \frac{\pi}{3}, \frac{\pi}{2} \right]$

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