The correct option is A ∠OQP
Consider triangles, △POQ and △ROS, wherein
PO = RO = 4 cm,
∠POQ = ∠ROS (vertically opposite angles) and
OQ = OS = 3 cm.
∴ By SAS criteria for congrunecy of triangles, △POQ ≅△ROS.
So, ∠OSR of △ROS corresponds to ∠OQP of △POQ.