The specific resistance of a wire is \[\rho \], its volume is 3\[{{m}^{3}}\] and its resistance is 3 ohms, then its length will be [CPMT 1984]

• A.                    \[\sqrt{\frac{1}{\rho }}\]
• B.                                      \[\frac{3}{\sqrt{\rho }}\]
• C.                    \[\frac{1}{\rho }\sqrt{3}\]                                          
• D.            \[\rho \sqrt{\frac{1}{3}}\]