If and z moves such that , then equals
None of these
As we have learnt
|z - z1| = |z - z2| is the equation of perpendicular of bisector of AB, where A(z1) and B(z2)
Now
The given equation is the perpendicular bisector of two points A(2+0i) and B(-2+0i), meaninf perpendicular bisector of (2,0) and (-2,0),which is y axis. Hence z will lie on y axis, so it’s argument will be or
So mod of argument will always be
So the correct option is (b)