If the quadrilateral \(PQRS\) can be completely inscribed in a circle \(C\) with \(PR\) passing through the center of the circle \(O,\) then what is the measure of the area of the quadrilateral \(PQRS?\)
1. \(PQ = QR,\) and \(PR\) is \(4\) units long.
2. \(PS = 2\sqrt2\)
Answer: C
Source: e-GMAT