If A = \(\begin{bmatrix} i & 0 \\\ 0 & -i \end{bmatrix}\), B = \(\begin{bmatrix} 0 & -1\\\ 1 & 0 \end{bmatrix}\) and C = \(\begin{bmatrix} 0 & i\\\ i & 0 \end{bmatrix}\) where \(i = \sqrt{-1}\) then which one of the following is correct?
1
AB = C
2
BA ≠ -C
3
A2 = B2 = C2 = l, where I is the identity matrix
4
None of these