1 . A=351402164

• A. $\left[\begin{array}{ccc}5& 5& 1\\ 4& 2& 2\\ 1& 6& 6\end{array}\right]$
• B. $\left[\begin{array}{ccc}1& 5& 1\\ 4& -2& 2\\ 1& 6& 2\end{array}\right]$
• C. $\left[\begin{array}{ccc}1& 3& -1\\ 4& 0& 2\\ 1& 6& 4\end{array}\right]$
• D. $\left[\begin{array}{ccc}1& 3& -1\\ 2& -2& 0\\ -1& 4& 2\end{array}\right]$

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Answer: Option B

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