A complex number z is said to be unimodular, if |z|= 1. suppose z1 and z2 are complex numbers such that 
is unimodular and z2 is not unimodular. Then, the point z1 lies on a
straight line parallel to X -axis
straight line parallel to Y -axis
circle of radius 2
circle of radius 2
C.
circle of radius 2
If z unimodular, then |z| = 1, also, use property of modulus i.e. 
Given, z2 is not unimodular i.e |z2|≠1 and 
is unimodular
