If and implies that in the complex plane 

a) 
lies on imaginary axis 
b) 
lies on real axis 
c) 
lies on unit circle 
d) 
None of these 
If and implies that in the complex plane 

a) 
lies on imaginary axis 
b) 
lies on real axis 
c) 
lies on unit circle 
d) 
None of these 
(b)
We have,
lies on the perpendicular bisector of the segment joining and
lies on axis