The process of the extraction of copper from copper pyrites involves:-
$(I)$ Froth floatation $(II)$ Calcination $(III)$ Roasting $(IV)$ Self reduction $(V)$ Smelting $(VI)$ Liquation $(VII)$ Electrorefining

  • A
    $I, III, IV, V$
  • B
    $I, III, IV, VII$
  • C
    $I, III, IV, V, VII$
  • D
    $I, II, IV, V, VII$

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