Let P and Q be two distinct points on a circle which has center at C(2,3) and which passes through origin O. If OC is perpendicular to both the line segments CP and CQ, then the set {P,Q} is equal to
(a) {(−1,5),(5,1)}
(b) {(2+22,3−5),(2−22,3+5)}
(c) {(2+22,3+5),(2−22,3−5)}
(d) {(4,0),(0,6)}