A b c d 26 let z = where a and d are square matrices, then choose incorrect (a) if z is symmetric, then a and d are symmetric (b) if zis diagonal, then a and da

A B C D 26 Let Z = where A and D are square matrices, then choose incorrect (a) If Z is symmetric, then A and D are symmetric (b) If Zis diagonal, then A and Dare diagonal (c) (c) If Z is upper triangular, then A and D are upper triangular (d) diagonal. If A and D are diagonal, then Z is