Math Chapter Wise Matrices And Determinants English MCQ UKPSC Lecturer (Mains) 2020 Q.If A and B are square matrices of order n such that AB = A and BA=B, then AA2 = A, B2 ≠B BA2 ≠A, B2 = B CA2 = A, B2 = B DA2 ≠ A, B2 ≠B Show answer Correct answer: A2 = A, B2 = B