MathematicsEasy53×since 2002Q3157If S={z∈C:z−iz+2i∈R}S = \left\{ {z \in C:{{z - i} \over {z + 2i}} \in R} \right\}S={z∈C:z+2iz−i∈R}, then :AS contains exactly two elementsBS contains only one elementCS is a circle in the complex planeDS is a straight line in the complex planeCheck answerSkip