If \( \mathrm{A}=\left[\begin{array}{ll}0 & 1 \\ 1 & 0\end{array}\r...

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If \( \mathrm{A}=\left[\begin{array}{ll}0 & 1 \\ 1 & 0\end{array}\right] \), then \( \mathrm{A}^{2} \) is equal to
\( \mathrm{P} \)
(A) \( \left[\begin{array}{ll}0 & 1 \\ 1 & 0\end{array}\right] \)
(B) \( \left[\begin{array}{ll}1 & 0 \\ 1 & 0\end{array}\right] \)
(C) \( \left[\begin{array}{ll}0 & 1 \\ 0 & 1\end{array}\right] \)
(D) \( \left[\begin{array}{ll}1 & 0 \\ 0 & 1\end{array}\right] \)
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