Equation of a Chord with a Given Middle Point

Q.

What is the equation of the chord centered at (1, 2) in the circle $x^2+y^2-4x-6y-10=0$

1. $x-y-3=0$

2. $x-y+3=0$

3. $x+y-3=0$

4. $x+y+3=0$