question_answer

Which is correct about magnetite iron ore?

A)  Magnetite is the most important industrial iron ore in terms of quantity used

B)  Magnetite has the inferior magnetic qualities which is not valuable in the electro industries

C)  It is the finest iron ore with very high content of iron upto 70%

D)  It has slightly lower iron content than hematite (50%-60%)

E)  None of these