$\int \frac{d x}{36-x^{2}}=$ কত ?

$\frac{1}{6} \tan ^{-1} \frac{x}{6}+c$

$\frac{1}{6} \sin ^{-1} \frac{x}{6}+c$

$\frac{1}{12} \ln \left|\frac{6+x}{6-x}\right|+c$

$\frac{1}{12} \ln \left|\frac{x-6}{x+6}\right|+c$