Answer:
Neither A or B
Explanation:
Rotation -90 is counter clockwise direction or turning left. 90 degrees places the figure from quadrant 1 & 4 into quadrant 2 & 1. This means point Q (2,1) rotates to Q' (-1,2). Point P (4,1) rotates to P' (-1,4). Point R (3,2) rotates to R' (2,3).