SSC JE Electrical Engineering 2012 Paper

a. The resistivity of the copper is 1.68 × 10${}^{\mathit{–}8}$
b. The resistivity of the manganin is 4.82 × 10${}^{\mathit{–}7}$
c. The resistivity of the aluminium is 2.65 × 10${}^{\mathit{–}8}$
d. The resistivity of the iron is 9.71 × 10${}^{\mathit{–}8}$
So copper has the least resistivity than iron, manganin and aluminium.