Answer the following questions with reference to the extraction of copper from its ore. In the Bessemer converter, copper sulphide is reduced to copper by which one of the following reaction?
A
`CuS+FeO rarr2Cu+FeO+S`
B
`CuS+FeS rarr2Cu+FeS_2`
C
`CuS+2Cu_(2)O rarr 6 Cu + SO_2`
D
`CuS+Fe rarr 2Cu +FeS`
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