Please give the solution. My ans. Came as 87 degrees . Where did i go wrong?

10. Suppose Q is a point on the circle with centre P and radius 1, as shown in the figure, R is a point outside the circle such that QR = 1 and ∠QRP = 2º. Let S be the point where the segment RP intersects the given circle. Then measure of ∠RQS equals-
Figure
(a) 86º
(b) 87º
(c) 88º
(d) 89º