The transformation matrix for mirroring a point in x - y plane about the line y = x is given by:

• A. \(\left[ {\begin{array}{*{20}{c}} 1&0\\ 0&{ - 1} \end{array}} \right]\)
• B. \(\left[ {\begin{array}{*{20}{c}} { - 1}&0\\ 0&1 \end{array}} \right]\)
• C. \(\left[ {\begin{array}{*{20}{c}} 0&1\\ 1&0 \end{array}} \right]\)
• D. \(\left[ {\begin{array}{*{20}{c}} 0&{ - 1}\\ { - 1}&0 \end{array}} \right]\)