The dimensions of four types of burnt clay bricks P, Q, R and S are given below. Which one of them, as per IS 1077 1992, falls in the category of standard modular size of normal burnt clay building brick. (All dimensions of bricks are in mm units)

P : 230 × 110 × 70 ; Q : 230 × 110 × 30 ; R : 190 × 100 × 90 ; S : 190 × 90 × 90