A) \[\left[ \begin{matrix} 0 & 0 \\ 0 & 0 \\ \end{matrix} \right]\]
B) \[\left[ \begin{matrix} 1 & 1 \\ 1 & 0 \\ \end{matrix} \right]\]
C) \[\left[ \begin{matrix} 1 & 0 \\ 0 & 1 \\ \end{matrix} \right]\]
D) \[\left[ \begin{matrix} 1 & 0 \\ 0 & 1 \\ \end{matrix} \right]\]
Correct Answer: B
Solution :
\[A=\left[ \begin{matrix} 1 & 1 \\ 0 & 1 \\ \end{matrix} \right],B=\left[ \begin{matrix} 0 & 1 \\ 1 & 0 \\ \end{matrix} \right]\Rightarrow AB=\left[ \begin{matrix} 1 & 1 \\ 1 & 0 \\ \end{matrix} \right]\].
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