When copper ore is mixed with silica in a reverberatory furnace, copper matte is produced, The copper matte contains_______ :-
A. Sulphides of copper (II) and iron (II)
B. Sulphides of copper (II) and iron (III)
C. Sulphides of copper (I) and iron (II)
D. Sulphides of copper (I) and iron (III)
