Statement-I: If A=(1,-1,3), B=(2,1,-2), C=(-5,2,-6) vertices of $\mathrm{\Delta ABC}$ then length of internal angular bisector of $\overline{)\mathrm{A}} \mathrm{is} \frac{3\sqrt{10}}{4}$.
Statement-II: If angular bisector of $\overline{)\mathrm{A}}$ meets opposite side in D then D divides $\overline{\mathrm{BC}}$ in AB:AC ratio 

Statement-I is true statement-II is true, Statement-II is correct explanation of Statement-I

Statement-I is false, statement-II is true

Statement-I is true statement-II is false

Statement-I is true statement-II is true , Statement-II is not correct explanation of statement-I.