What length of the wire of specific resistance \[48\times {{10}^{-8}}\,\Omega \,\,m\] is needed to make a resistance of 4.2 W (diameter of wire = 0.4 mm) [CBSE PMT 2000; Pb. PMT 2002]

• A.            4.1 m                                       
• B.            3.1 m
• C.            2.1 m                                       
• D.            1.1 m