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In which of the following pair(s) the minerals are converted in to metals by self-reduction process?A. `Cu_2S, PbS`B. PbS, HgSC. PbS, ZnSD. `Ag_2S, Cu_2S`

Answer» Correct Answer - A,B
`Cu_2S+2Cu_2Oto6Cu+SO_2`
`PbS+2PbO to 2Pb+SO_2`
`HgS+2HgOto3Hg+SO_2`


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