For the circle x2+y2−10x+4y+20=0, three points are considered: P(5,−1), Q(2,−2) and R(9,−2). Which one of the following statements is correct?
(a) P,Q and R are all inside the circle
(b) P is inside, Q is on, and R is outside the circle
(c) P is on the circle while Q and R are outside
(d) P is inside, but both Q and R are outside the circle