What is \int \frac{d x}{x(x^{2}+1)} equal to? [NDA-II 2021]

Correct Answer is : 12ln(x2x2+1)+C

\frac{1}{2} \ln ( {x^{2}}/{x^{2}+1})+C

\frac{3}{2} \ln ( {x^{2}}/{x^{2}+1})+C