Mark against the correct answer in the following:

Question:

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

$\int_{0}^{\pi / 4} \tan ^{2} x d x=?$

A. $\left(1-\frac{\pi}{4}\right)$

B. $\left(1+\frac{\pi}{4}\right)$

C. $\left(1-\frac{\pi}{2}\right)$

D. $\left(1+\frac{\pi}{2}\right)$

Solution:

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