$\int_{-\pi / 2}^{\pi / 2} \frac{1}{1+ e^{\sin x}} dx$ का मान ज्ञात कीजिए।

  • A
    $\pi$
  • B
    $\frac{3\pi}{2}$
  • C
    $\frac{\pi}{4}$
  • D
    $\frac{\pi}{2}$

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