यदि $\int \log \left(6 \sin ^2 x+17 \sin x+12\right)^{\cos x} d x=f(x)+c$ है,तो $f\left(\frac{\pi}{2}\right)=$

  • A
    $\frac{1}{6}\left[\log 5^5+\log 7^7-12\right]$
  • B
    $\frac{1}{6}[7 \log 5+5 \log 7+29]$
  • C
    $\frac{1}{6}[14 \log 5+15 \log 7+12]$
  • D
    $\frac{1}{6}[15 \log 5+14 \log 7-29]$

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