If A is a symmetric matrix and B is a skew-symmetric matrix such that A + B = \(\left[ {\begin{array}{*{20}{c}} 2&3\\ 5&{ - 1} \end{array}} \right]\), then AB is equal to
1
\(\left[ {\begin{array}{*{20}{c}} { - 4}&2\\ 1&4 \end{array}} \right]\)
2
\(\left[ {\begin{array}{*{20}{c}} { - 4}&{ - 2}\\ { - 1}&4 \end{array}} \right]\)
3
\(\left[ {\begin{array}{*{20}{c}} 4&{ - 2}\\ { - 1}&{ - 4} \end{array}} \right]\)
4
\(\left[ {\begin{array}{*{20}{c}} 4&{ - 2}\\ 1&{ - 4} \end{array}} \right]\)