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If $A$ is a symmetric matrix and $B$ is a skew-symmetric matrix such that $A + B = \begin{bmatrix} 2 & 3 \ 5 & -1 \end{bmatrix}$, then $AB$ is equal to:
(1) $\begin{bmatrix} -4 & -2 \ -1 & 4 \end{bmatrix}$
(2) $\begin{bmatrix} 4 & -2 \ -1 & -4 \end{bmatrix}$
(3) $\begin{bmatrix} 4 & -2 \ 1 & -4 \end{bmatrix}$
(4) $\begin{bmatrix} -4 & 2 \ 1 & 4 \end{bmatrix}$
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