List-$I$ contains different compounds formed during the extraction of metal $(M)$ in List-$II$. Match the compounds in List-$I$ with the corresponding metal and process in List-$II$.
List-$I$ List-$II$
$(P). [M(CN)_2]^-$ $(1). Ni$ (during refining of metal)
$(Q). [M(CO)_4]$ $(2). Ti$ (during refining of metal)
$(R). MI_4$ $(3). Pb$ (during roasting of ore)
$(S). MO$ $(4). Ag$ (during leaching of ore)

  • A
    $P-4, Q-1, R-2, S-3$
  • B
    $P-4, Q-2, R-1, S-3$
  • C
    $P-3, Q-1, R-2, S-4$
  • D
    $P-1, Q-2, R-4, S-3$

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