Q137. For a complex number z = x + yi, where x and y are real numbers and i is the imaginary unit, what is the formula for its modulus, |z|?Mathematics — Number Systems — Question 137 of 195A. √(x2 + y2)B. √(x2 - y2)C. x - yiD. x2 + y2Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →