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

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

$\int \frac{(1+\cos x)}{(1-\cos x)} d x=?$

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

B. $-2 \cot \frac{x}{2}+x+C$

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

D. none of these

Solution:

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