Let m (r) be the set of all m x n real matrices. which of the following statements is correct? mxn (a) 3a e m,xs(r) s.t. the dimension of null space of a is 2 (

Let M (R) be the set of all m x n real matrices. Which of the following statements is correct? mxn (A) 3A E M,xs(R) s.t. the dimension of null space of A is 2 (B) 3A e M,y5 (R) s.t. the dimension of null space of A is 0 (C) 3A e M,xs (R) and B e Mgv (R) s.t. AB is the 2 x 2 identity matrix (D) 3A e Mss (R) whose null space is {(x,, x, X, X, X)} e R$ |x, = X X, =X,=1