\textbf{131-} In the figure below, segment $AC$ equals chord $AB$. Which of the following is necessarily true?
\textit{[Figure: Circle with points A, B, C, D where AC is a chord equal to chord AB]}
\begin{itemize}
\item[(1)] $BC = BA$
\item[(2)] $BD = AC$
\item[(3)] $BC = BD$
\item[(4)] $DA = DC$
\end{itemize}