જો $\frac{d}{d x}\left\{\left(\frac{x-1}{x-\sqrt{x}}\right) e^{2 x+1}\right\}=\frac{x-1}{x-\sqrt{x}} e^{2 x+1} f(x)$ હોય, તો $f(4)=$

  • A
    $0$
  • B
    $1$
  • C
    $\frac{35}{24}$
  • D
    $\frac{47}{24}$

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