The diagram shows a regular hexagon PQRSTUPQRSTUPQRSTU, a square PQVWPQVWPQVW and an equilateral triangle VXWVXWVXW. What is the size of angle XVRXVRXVR?(A) 120°120°120° (B) 125°125°125° (C) 130°130°130° (D) 135°135°135° (E) 140°140°140°