Find the Center and Radius of the Circle by Completing $x^{2}+y^{2}-10 x+12 y+49=0$

Multiple Choice

Find the center and radius of the circle by completing the square.
- $x^{2}+y^{2}-10 x+12 y+49=0$

A) $(5,-6) , r=2 \sqrt{3}$
B) $(-5,6) , r=2 \sqrt{3}$
C) $(5,-6) , r=12$
D) $(-5,6) , r=12$