MCQ
The product formed from the following reaction sequence is ?


- A

- B

- ✓

- D








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[Atomic masses $\mathrm{Cu}: 63.54\, \mathrm{u}, \mathrm{S}: 32\, \mathrm{u}, \mathrm{O}: 16 \,\mathrm{u}, \mathrm{H}: 1\, \mathrm{u}]$
$A\,\xrightarrow[{1200\,\,atm}]{{470\,\,K}}B$
$A\,\xrightarrow[{C{O_2}\, - \,atm}]{{570\,\,K}}C$

| Column - $I$ | Column - $II$ |
| $(a)$ Copper | $(i)$ Non-metal |
| $(b)$ Fluorine | $(ii)$ Transition Metal |
| $(c)$ Silicon | $(iii)$ Lanthanoid |
| $(d)$ Cerium | $(iv)$ Metalloid |
Identify the correct match: