Q21. What is the equation of a circle that passes through the points (1, 2) and (2, 1) and has its center on the x-axis?Mathematics — Conic Sections — Question 21 of 272A. x2 + y2 - 4x - 1 = 0B. x2 + y2 = 5C. x2 + y2 + 4x - 9 = 0D. x2 + y2 + 2x - 9 = 0Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →