设 $A , B$ 为 $n(n \geq 2)$ 阶矩阵,则下列说法中,错误的是()
$\text{A.}$ $\left(\begin{array}{ll}A & O \\ O & B\end{array}\right)$ 与 $\left(\begin{array}{ll}B & O \\ O & A\end{array}\right)$ 相似.
$\text{B.}$ $\left(\begin{array}{ll}O & A \\ B & O\end{array}\right)$ 与 $\left(\begin{array}{ll}O & B \\ A & O\end{array}\right)$ 相似.
$\text{C.}$ $\left(\begin{array}{ll}A & O \\ O & B\end{array}\right)$ 与 $\left(\begin{array}{ll}O & A \\ B & O\end{array}\right)$ 相似.
$\text{D.}$ $\left(\begin{array}{ll}A & O \\ O & B\end{array}\right)$ 与 $\left(\begin{array}{cc}A & B-A \\ O & B\end{array}\right)$ 相似.