$\int_0^\pi \sqrt{1+4 \sin^2 \frac{x}{2}+4 \sin \frac{x}{2}} \, dx$ का मान ज्ञात कीजिए।

  • A
    $\pi$
  • B
    $\pi+2$
  • C
    $\pi+4$
  • D
    $0$

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