All the four of the 2 x 2 matrix p = are non zero, and one of its eigen values is zero. Which of the following statements is true?-A-P11P22 P12P21 = 1B-P11P22 P12P21 = 1C-P11P22 P12P21 = 0D-P11P22 + P12P21 = 1-C-P11P22 P12P21 = 0

C P11P22 P12P21 = 0 Use [λI P] = 0 ⇒(λ P11)(λ P22) P21P12 = 0 Putting λ = 0, we get P11P22 P21P12 = 0.