In the process of extraction of gold,
Roasted gold ore `+CN^(-)+H_2Ooverset(o_2)rarr[X]+OH^(-)`
`[X]+Znrarr[Y]+Au`
Identify the complexes [X] and [Y]

Options

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-)):}`

Answer

A