Two wires $X$ and $Y$ are made of the same metal and have equal resistance. Which row shows a possible set of values for $X$ and for $Y$?
- Alength of $X$: $50\,\text{cm}$, diameter of $X$: $0.40\,\text{mm}$; length of $Y$: $200\,\text{cm}$, diameter of $Y$: $0.10\,\text{mm}$
- Blength of $X$: $50\,\text{cm}$, diameter of $X$: $0.40\,\text{mm}$; length of $Y$: $200\,\text{cm}$, diameter of $Y$: $0.20\,\text{mm}$
- Clength of $X$: $50\,\text{cm}$, diameter of $X$: $0.40\,\text{mm}$; length of $Y$: $200\,\text{cm}$, diameter of $Y$: $0.80\,\text{mm}$
- Dlength of $X$: $50\,\text{cm}$, diameter of $X$: $0.40\,\text{mm}$; length of $Y$: $200\,\text{cm}$, diameter of $Y$: $1.60\,\text{mm}$