$\mathrm {\int_{2}^{3} \dfrac{\ln (x-1)}{x-1} d x}$ এর মান কত?

$\mathrm {2 ~ ln2}$

$\mathrm {2 (ln2)^2}$

$\mathrm {\dfrac{1}{2}~{ (ln2)^2}}$

$\mathrm {\dfrac{1}{2}~{ (ln2)^2}}$