AB is a straight line and a point O lies on it. A ray OC is drawn such that point C does not lie on line AB. Under these conditions, which of the following statements is/are true? (a) ∠AOC and ∠BOC form a linear pair. (b) ∠AOB and ∠BOC are adjacent angles.

If B is the center of a circle and lines AD and CD are tangent segments drawn from an external point D, then which of the following classifications apply to quadrilateral ABCD? (a) Kite (b) Cyclic quadrilateral (c) Rhombus (d) Trapezium

In a parallelogram PQRS, rays PA and SA are the angle bisectors of ∠QPS and ∠RSP respectively. Find the measure of ∠PAS.