Math Chapter Wise Complex Number, De Moivre's Theorem And Nth Root Of Unity English MCQ KVS PGT 2022 Q.If |a+ib|=|c+id|, then: Aa2 +c2 =0 Bb2 +c2 =0 Ca2 +b2 =c2 +d2 Db2 +d2 =0 Show answer Correct answer: a2 +b2 =c2 +d2