Solve this following


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

$\int \frac{\sec ^{2} x}{\sqrt{\tan ^{2} x-4}} d x=?$

A. $\log \left|\tan x-\sqrt{\tan ^{2} x-4}\right|+C$

B. $\log \left|\tan x+\sqrt{\tan ^{2} x-4}\right|+C$

C. $\frac{1}{2} \log \left|\tan x+\sqrt{\tan ^{2} x-4}\right|+C$

D. none of these


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