$\left(\frac{x^{2}-x-6}{x^{2}+x-12}\right) \div \left(\frac{x^{2}+5x+6}{x^{2}+7x+12}\right)$ का मान क्या है?

  • A
    $1$
  • B
    $\frac{x-3}{x+3}$
  • C
    $\frac{x+4}{x-3}$
  • D
    $\frac{x-3}{x+4}$

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