यदि \(4x = 18y\) हो, तो \(\left(\frac{x}{y} - 1\right)^2\) का मान कितना होगा?
Choose Your Option
A. \(\frac{1}{3}\)
B. \(\frac{7}{2}\)
C. \(\frac{2}{3}\)
D. \(\frac{3}{2}\)