For two similar triangles, the corresponding angles are always congruent.
We know two pairs of corresponding angles:
m∠A=m∠E
m∠B=m∠F
As mentioned above, all corresponding angles are congruent, so the remaining pair must be equal:
m∠C=m∠D
Having established the corresponding pairs we can name both triangles. When you name the triangles, the letters of the corresponding vertices must be in the same position, starting with the first corresponding pair ∠A and ∠E the name of the triangles can be:
Following the order of the letters, you can determine the corresponding sides:

The correct option is the second:
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