To which of the following ores, calcination process is not applicable

The Calcination is the process of heating the concentrated ore strongly in a limited supply of air or in the absence of air.

 Calcination is done on ${\mathrm{CaCO}}_3$, ${\mathrm{Al}}_2{\mathrm{O}}_3·{\mathrm{H}}_2\mathrm{O}$ and ${\mathrm{CaCO}}_3·\mathrm{Ca}(\mathrm{OH}{)}_2$.

But, $\mathrm{ZnS}$ undergoes roasting to get oxide.

$2\mathrm{ZnS}+3{\mathrm{O}}_2\to 2\mathrm{ZnO}+2{\mathrm{SO}}_2$

Hence, Option(D) is the correct answer.