$\begin{array}{1 1} (a)\;\large\frac{BF}{EC} = \frac{BE}{FE} \\ (b)\;\large\frac{BE}{EC}=\frac{BF}{FE} \\ (c)\; \large\frac{BF}{FE}=\frac{BE}{EC} \\ (d)\; \large\frac{EC}{BF}=\frac{FE}{BE} \end{array}$