If A and B are two matrices such that AB = O (null matrix) then A. A may be a null matrices, but B may not be a null matrix. B. B may be a null matrix, but A may not be a null matrix. C. both A and B may be null matrices. D. both A and B may be non-null matrices. Choose the correct answer from the option given below:

A, B Only A, B, C only C, D only A, B, C, D only

A, B, C, D only

A, B, C, D all are correct Option: D