If $x$ is real, then the maximum and minimum values of the expression $\frac{{{x^2} - 3x + 4}}{{{x^2} + 3x + 4}}$ will be

  • [IIT 1984]
  • A

    $2, 1$

  • B

    $5,\frac{1}{5}$

  • C

    $7,\frac{1}{7}$

  • D

    None of these

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