Two identical wires X and Y, each having length $L$ and radius $r$, are joined in parallel as shown. The resistance of this arrangement is $R_1$. Wire X is then replaced by a wire made from the same material with length $L$ and radius $2r$. The resistance of the updated arrangement is $R_2$. What is the ratio $\frac{R_1}{R_2}$?
- A$\frac{2}{5}$
- B$\frac{2}{3}$
- C$\frac{3}{2}$
- D$\frac{5}{2}$