Q71. Which of the following pairs of straight lines intersect at right angles?Mathematics — NUST Mock 9 — Question 71 of 200A. 2x2 = y(x + 2y)B. (x + y)2 = x(y + 3x)C. 2y(x + y) = xyD. y = ±2xPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →