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The correct Answer is:
`A-p,q,t; B-p;q; C-p,q,r,s,t; D-p,q,r,s,t`
(A) By using froth floatation process Pb Ore, Cu ore and Zn ore can be concentrated (B) By using self reduction. Pb and Cu can be extracted from their ores.
Roasting is suitable for all ores like Pb, Cu, Fe, Sn and Zn can be concentrate when they are as sulphide ores.
(D) Pyometallurgral process can be used to extract the metals from Pb, Cu, Fe, Sn and Zn ores.
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