In the diagram, \triangle Q R S is an isosceles right-angled triangle with Q R=S R and \angle Q R S=90^{\circ}. Line segment P T intersects S Q at U and S R at V. If \angle P U Q=\angle R V T=y^{\circ}, the value of y is
Answer Choices
A. 72.5
B. 60
C. 67.5
D. 62.5
E. 70