Triangle qrs and triangle qtv are similar. which equation must be true?

I believe there must be choices for this problem so we could work on with the solution but the general concept of similar triangles is that the ratio of the corresponding sides should be equal. Example, qr/rs should be equal to qt/tv. Moreover, you can do the same for the other corresponding sides. With regards to the angles, corresponding angles should be equal. Such that,
                             ∠r = ∠t