Mark against the correct answer in each of the following:
Question:

Mark $(\sqrt{)}$ against the correct answer in each of the following:

$\int \tan ^{-1} x d x=?$

A. $x \tan ^{-1} \mathrm{x}+\frac{1}{2} \log \left|1+\mathrm{x}^{2}\right|+\mathrm{C}$

B. $x \tan ^{-1} x-\frac{1}{2} \log \left|1+x^{2}\right|+C$

C. $-x \tan ^{-1} x+\frac{1}{2} \log \left|1+x^{2}\right|+C$

D. none of these

Solution:

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