2010 AMC 12B Problem 22

Let ABCD be a cyclic quadrilateral. The side lengths of ABCD are distinct integers less than 15 such that BC\cdot CD=AB\cdot DA. What is the largest possible value of BD?

\textbf{(A)}\ \sqrt{\dfrac{325}{2}} \qquad \textbf{(B)}\ \sqrt{185} \qquad \textbf{(C)}\ \sqrt{\dfrac{389}{2}} \qquad \textbf{(D)}\ \sqrt{\dfrac{425}{2}} \qquad \textbf{(E)}\ \sqrt{\dfrac{533}{2}}

Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.