In the Following questions pick the odd thing out.

A

$$\begin{bmatrix}1 & 1 \\1 & 1 \end{bmatrix}$$

B

$$\begin{bmatrix}-1 & -1 \\1 & 1 \end{bmatrix}$$

C

$$\begin{bmatrix}1 & -1 \\1 & 1 \end{bmatrix}$$

D

$$\begin{bmatrix}1 & -1 \\-1 & 1 \end{bmatrix}$$