Respuesta :
Correct answer is: AB is parallel to PQ.
AB is perpendicular to CR and DS => CR is parallel to DS
CR = DS and CR is parallel to DS => CRSD is a parallelogram =>
=> CD is parallel to RS => AB is parallel to PQ
AB is perpendicular to CR and DS => CR is parallel to DS
CR = DS and CR is parallel to DS => CRSD is a parallelogram =>
=> CD is parallel to RS => AB is parallel to PQ