Which of the following complex matrices is NOT diagonalizable?
(1ii−1)\begin{pmatrix} 1 & i \\ i & -1 \end{pmatrix}(1ii−1)
(1i−i1)\begin{pmatrix} 1 & i \\ -i & 1 \end{pmatrix}(1−ii1)
(1112)\begin{pmatrix} 1 & 1 \\ 1 & 2 \end{pmatrix}(1112)
(01−10)\begin{pmatrix} 0 & 1 \\ -1 & 0 \end{pmatrix}(0−110)