यदि $\int \frac{dx}{2 \cos x + 3 \sin x + 4} = \frac{2}{\sqrt{3}} f(x) + c$ है,तो $f\left(\frac{2 \pi}{3}\right) =$

  • A
    $\frac{\pi}{12}$
  • B
    $\frac{\pi}{8}$
  • C
    $\frac{5 \pi}{12}$
  • D
    $\frac{5 \pi}{8}$

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