Which of the following equations can represent a triangle:

|z−1|=|z−2|=|z−i| (i)      |z−1|=|z−i|Represents a straight line through origin i.e., y=x(ii)         |z−1|=|z−2|⇒x=32which is a straight line(iii)        |z−2|=|z−i|⇒4x−2y=3which  is a straight line