Solve this following
Question:

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

$\int \frac{\mathrm{dx}}{\sqrt{3 \mathrm{x}^{2}+6 \mathrm{x}+12}}=?$

A. $\log \left|(x+1)+\sqrt{x^{2}+2 x+4}\right|+C$

B. $\frac{1}{3} \log \left|(x+1)+\sqrt{x^{2}+2 x+4}\right|+C$

C. $\frac{1}{\sqrt{3}} \log \left|(x+1)+\sqrt{x^{2}+2 x+4}\right|+C$

D. none of these

Solution:

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