Minerals from which metals can be extracted economically and easily are called ores.The extraction of metals from theirs ores involves the following processes.
(i)Concentration.
(ii)Calcination | roasting | leaching .
(iii)Reduction.
It is carried out be one of the following methods.
Which of the following is not correctly matched ?

Options

A. Red bauxite-Purification by Serpeck's method
B. Iron from haematite-Carbon monoxid reduction
C. Calamine-Carbonate ore.
D. `FeSiO_(3)`- Slag obtained in the extraction of copper.

Answer

a