Math Chapter Wise Modern Algebra English MCQ Bihar (TRE 1.0) -2023 Q.If R is a ring with unity a, b ∈R such that ab = 1, then Aba is an idempotent in R but (1- ba) is not Bboth ba and (1– ba) are idempotent elements in R Cneither ba nor (1- ba) is an idempotent element in R DMore than one of the above ENone of the above Show answer Correct answer: both ba and (1– ba) are idempotent elements in R