MCQ
$\int \frac{x^4+x^2+1}{x^2+1} d x=\ .......... \ +C$
- A$\tan ^{-1} x+\frac{x^4}{4}$
- B$\frac{x^3}{3}+\tan ^{-1} x$
- C$\log \left(x^2+1\right)$
- D$\frac{x^3}{3}+\frac{1}{2} \log \left|\frac{x+1}{x-1}\right|$
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