A wire of length 5\[m\] and radius 1\[mm\] has a resistance of 1 ohm. What length of the wire of the same material at the same temperature and of radius 2\[mm\] will also have a resistance of 1 ohm

• A.                    1.25\[m\]
• B.                                      2.5\[m\]
• C.                    10\[m\]
• D.                                      20\[m\]