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Suppose z=x+iy where x and y are real nu...

Suppose `z=x+iy` where x and y are real numbers and `i=sqrt(-1)` . The points (x ,y) for which `(z-1)/(z-i)` is real . Lie om -

A

an ellipse

B

a circle

C

a parabola

D

a straight line

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The correct Answer is:
D
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