If $\frac{x^2}{k-\frac{5}{2}}+\frac{y^2}{\frac{7}{3}-k}= 1$ ($k$ is a real number) represents a hyperbola,then the set of all values of $k$ is

  • A
    $\left(\frac{5}{2}, \infty\right)$
  • B
    $\left(\frac{7}{3}, \frac{5}{2}\right)$
  • C
    $\left(-\infty, \frac{7}{3}\right) \cup \left(\frac{5}{2}, \infty\right)$
  • D
    $R - \left[\frac{7}{3}, \frac{5}{2}\right]$

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