Name the metal M which is extracted on t...

Name the metal M which is extracted on the basis of following reactions
`4M+8CN^(-)+2H_2O+O_2to4[M(CN)_2]^(-)+4OH^-`
`2[M(CN)_2]^(-)+Znto[Zn(CN)_4]^(2-)+2M`:

A

Nickel

B

Silver

C

Copper

D

Mercury

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The correct Answer is:

B

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