Mark against the correct answer in each of the following:

Question:

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

$\int \tan ^{2} \frac{\mathrm{x}}{2} \mathrm{dx}=?$

A. $\tan \frac{x}{2}-x+C$

B. $\tan \frac{x}{2}+x+C$

C. $2 \tan \frac{x}{2}+x+C$

D. $2 \tan \frac{x}{2}-x+C$

Solution:

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