The correct match of column I with column II is: `
` Column I (impure metals) a. Si, Ge b. Hg, Cd c. Cu, Ag d. Pb, Sn. Column II (refining process) (i) electrorefining, (ii) Zone refining, (iii) Liquation, (iv) Distillation

Options

A. a(ii), b(iv), c(iii), d(i)
B. a(ii), b(iv), c(i), d(iii)
C. a(iv), b(ii), c(i), d(iii)
D. a(iv), b(ii), c(iii), d(i)