In the cyanide extraction process of sil...

In the cyanide extraction process of silver form argentite ore , the oxidizing and reducing agents used are

A

`HNO_3 and CO` respectively

B

`HNO_3 and Zn` dust respectively

C

`O_2 and Zn` dust respectively

D

`O_2 and CO` respectively

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The correct Answer is:

C

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