If z= x+iy and omega = frac{1-iz}{z-i}, ...

If `z= x+iy` and `omega = frac{1-iz}{z-i}`, the `abs(omega) = 1` shows that in complex plane.

A

A.z will be at imaginary axis

B

B.z will be at real axis

C

C.z will be at unity circle

D

D.none of these

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