In the figure shown, PQs is a straight line. What is the value of

In the figure shown, PQs is a straight line. What is the value of < PRQ?

The correct answer is: D

< QPR + < PRQ = < RQS

(Sum of two interior angles of a triangle = Opposite exterior angles)

70^o + < PRQ = 148

< PRQ = 148^o - 70^o

= 78^o