Which of the following reactions is/are ...

Which of the following reactions is/are involved in the extraction of Cy from any ore of copper?

A

`Cu_(2)O+C overset(Delta)to 2Cu+CO`

B

`CuSO_(4)+Fe to Cu+SO_(2)`

C

`2CuSO_(4)+Cu_(2)S to 6Cu+SO_(2)`

D

All of the above

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The correct Answer is:

D

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