A. silica, aluminium and iron
B. silica, iron and magnesium
C. iron and manganese
D. silica and bauxite
Correct Answer:
Option A – silica, aluminium and iron
A. silica, aluminium and iron
B. silica, iron and magnesium
C. iron and manganese
D. silica and bauxite
Correct Answer:
Option A – silica, aluminium and iron
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