Mark against the correct answer in each of the following:

Question:

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

$\int \frac{3 x^{2}}{\left(1+x^{6}\right)} d x=?$

A. $\sin ^{-1} x^{3}+C$

B. $\cos ^{-1} x^{3}+C$

C. $\tan ^{-1} x^{3}+C$

D. $\cot ^{-1} \mathrm{x}^{3}+\mathrm{C}$

Solution:

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