In parallelogram PQRS, diagonal PR is drawn. A student proves △PQR≅△SPR. To show that diagonal PR bisects ∠P, which pair of equal angles should the student cite as corresponding parts?
(a) ∠PRQ and ∠RSP
(b) ∠PQR and ∠PRS
(c) ∠QPR and ∠RPS
(d) ∠QRP and ∠PSR