If $y = f \left( \frac{3x + 4}{5x + 6} \right)$ and $f'(x) = \tan(x^2)$,then $\frac{dy}{dx} = $

  • A
    $\tan(x^3)$
  • B
    $- 2 \tan \left[ \frac{3x + 4}{5x + 6} \right]^2 \cdot \frac{1}{(5x + 6)^2}$
  • C
    $f \left( \frac{3 \tan(x^2) + 4}{5 \tan(x^2) + 6} \right) \tan(x^2)$
  • D
    None of these

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