Equation of Radical Axis

Q.

Two circles, each of radius 5 units, touch each other at (1, 2). If the equation of their common tangent is 4x + 3y – 10 = 0 then equation of one such circle is

1. $x^2+y^2–6x+2y–15=0$

2. $x^2+y^2–10x–10y+25=0$

3. $x^2+y^2+6x–2y–15=0$

4. $x^2+y^2–10x–10y–25=0$