Mark against the correct answer in the following:

Question:

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

$\int_{0}^{\pi / 2} \frac{\sqrt{\cot x}}{(1+\sqrt{\cot x})} d x=?$

A. $\frac{\pi}{4}$

B. $\frac{\pi}{2}$

C. 0

D. 1

Solution:

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