Respuesta :

PQRS is corresponding to LMNO.
Which means that angle QRS is corresponding to angle MNO
I also believe the answer is MNO, But I am unsure as my method seems to simple.
PQRS
LMNO
QRS=MNO because they match up, which means if they are similar shapes the points should also match up when drawn. Because similar shape have congruent Angles then QRS must be equal to MNO