If $A=\{x \in R: \sqrt{x^2-8x+15} \in R\}$ and $B=\{x \in R: \frac{x-3}{2x-5} < \frac{x-6}{2x-11}\}$, then $A \cap B=$

  • A
    $\phi$
  • B
    $\left(\frac{5}{2}, 3\right] \cup \left[5, \frac{11}{2}\right)$
  • C
    $\left(\frac{5}{2}, \frac{21}{4}\right)$
  • D
    $\left(\frac{5}{2}, \frac{11}{2}\right)$

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