Pb and Sn are extracted from their chief ore by `:`

Options

A. self-reduction and carbon reduction
B. carbon reduction and self-reduction
C. electrolysis and self-reduction
D. self-reduction and electrolysis

Answer

A

Explanation

`{:(2PbS+3O_(2)overset(Delta)to2PbO+2SO_(2)),(2PbO+PbSoverset(Delta)to3Pb+SO_(2)):}}Self-reduction `