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In the process of extraction of gold , ...

In the process of extraction of gold , Roasted gold ore ` + CN_((aq))^(-) + H_(2)O overset(O_(2))to [X] + [OH^(-)]`
` [X] + Zn to [Y] + Au`
Indentify the complexes [X] and [Y]

A

`{:(X - [Au(CN)_(2)]^(-),,,Y=[Zn(CN)_(4)]^(2-)):}`

B

`{:(X = [Au(CN)_(4)]^(3-),,,Y = [Zn(CN)_(4)]^(2-)):}`

C

`{:(X = [Au(CN)_(2)]^(-),,,Y = [ZN(CN)_(6)]^(4-)):}`

D

`{:(X = [Au(CN)_(4)]^(3-),,, Y = [Zn(CN)_(6)]^(2-)):}`

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The correct Answer is:
A
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