If $f^{\prime}(x)=\tan ^2(x)+\cot ^2(x)$ and $f\left(\frac{\pi}{4}\right)=0$,then $f(x)$ is equal to:

  • A
    $\tan (x)-\cot (x)-x+\frac{\pi}{2}$
  • B
    $\tan (x)-\cot (x)-2 x+\frac{\pi}{2}$
  • C
    $\tan (x)+\cot (x)-2 x+\frac{\pi}{2}$
  • D
    $\sec (x)-\operatorname{cosec}(x)-2 x+\frac{\pi}{2}$

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