A) \[\left[ \begin{matrix} {{\sigma }_{1}} & {{\sigma }_{1}} \\ 0 & {{\sigma }_{2}} \\ \end{matrix} \right]\]
B) \[\left[ \begin{matrix} {{\sigma }_{1}} & 0 \\ 0 & -{{\sigma }_{2}} \\ \end{matrix} \right]\]
C) \[\left[ \begin{matrix} {{\sigma }_{x}} & {{\tau }_{xy}} \\ 0 & -{{\sigma }_{Y}} \\ \end{matrix} \right]\]
D) none of the above
Correct Answer: D
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