Solve this following

Question:

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

$\int \frac{x^{2} d x}{\sqrt{x^{6}+a^{6}}} d x=?$

A. $\frac{1}{3} \log \left|x^{6}+a^{6}\right|+C$

B. $\frac{1}{3} \tan ^{-1}\left(\frac{x^{3}}{a^{3}}\right)+C$

C. $\frac{1}{3} \log \left|x^{3}+\sqrt{x^{6}+a^{6}}\right|+C$

D. none of these

Solution:

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