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For complex z, |z + i| = |z - i| describes:

AA circle
BThe real axis
CThe imaginary axis
DOrigin only
Answer & Solution
Correct answer: B. The real axis
Equidistant from i (= (0, 1)) and -i (= (0, -1)) means z lies on the perpendicular bisector — the real axis (y = 0).
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