A) a straight line
B) a circle
C) y-axis
D) None of these
Correct Answer: B
Solution :
\[|z-3i|=2\] \[\Rightarrow \] \[|x+iy-3i|=2\] \[\Rightarrow \] \[|x(y-3)i|=2\] \[\Rightarrow \] \[\sqrt{{{x}^{2}}+{{(y-3)}^{2}}}=2\] \[\Rightarrow \]\[{{x}^{2}}+{{(y-3)}^{2}}=4;\]which represents a circle.
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