1. $A=\left(\begin{array}{cc}1& i\\ -i& 1\end{array}\right)$

• A. $\left(\begin{array}{cc}0& 1\\ 0& 1\end{array}\right)$
• B. $\left(\begin{array}{cc}0& 1\\ 0& 1\end{array}\right)$
• C. $\left(\begin{array}{cc}0& 1\\ 0& 1\end{array}\right)$
• D. $\left(\begin{array}{cc}0& 1\\ 0& 1\end{array}\right)$

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