In the figure given below, what can you conclude about the figure :

Question

$\begin{array}{1 1} (a)\; \Delta BAC \cong \Delta EFD \\ (b)\; \Delta ABC \cong \Delta DEF \\ (c)\; \text{ $\Delta$ DEF is isosceles }\\ (d)\; \text{$\Delta$ ABC is isosceles} \end{array}$