Extraction of silver metal is done mainly from argentite `(Ag_2S)` ore: The concentrated ore on treatment with dil. NaCN solution and then followed by continuous agitation for several hours, which of the following products are obtained?
A
AgCN and `Na_2S`
B
Ag and NaCN
C
`Na_2SO_4 and Na_2SO_3`
D
`Na[Ag(CN)_2] and Na_2S`
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