Answer:
∠ EAB ≅ ∠ ECD
Explanation:
See the attached problem. 
We are given the quadrilateral ABCD is a parallelogram and the proof of Δ AEB ≅ Δ DEC is given in a table. 
Now, we have to select statement 3 from the given options. 
The statement 2 is line AB is parallel to line DC and hence, we conclude that the statement 3 will be ∠ EAB ≅ ∠ ECD. as AC is the transverse line between parallel lines AB and DC. (Answer)