1. $A=\left[\begin{array}{cc}5& 7\\ 4& 6\end{array}\right]$

• A. $A=\left[\begin{array}{cc}6& -7\\ -4& 5\end{array}\right]$
• B. $A=\left[\begin{array}{cc}6& -7\\ -4& 5\end{array}\right]$
• C. $A=\left[\begin{array}{cc}6& -7\\ -4& 5\end{array}\right]$
• D. $A=\left[\begin{array}{cc}6& -7\\ -4& 5\end{array}\right]$

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