Plaster of Paris is prepared from 

Knowing the plaster of Paris recipe is necessary to solve this. Plaster of Paris is a calcium sulphate that contains half a molecule of water for every molecule of salt.

The chemical formula of gypsum is ${\text{CaSO}}_4.2{\text{H}}_2\text{O}$.The plaster of Paris is formed when gypsum is heated at $423 \text{K}$.

The reaction for the formation of Plaster of Paris is shown below.

$\mathrm{CaSO}4.2{\mathrm{H}}_2\mathrm{O}+\mathrm{Heat}\to {\mathrm{CaSO}}_4.0.5{\mathrm{H}}_2\mathrm{O}+1.5{\mathrm{H}}_2\mathrm{O}$

Hence plaster of Paris is obtained from gypsum.

White powder is plaster of paris. Plaster of Paris forms a solid mass when combined with water. This is due to the production of gypsum crystals and the evolution of heat. Broken bones are fixed with plaster of paris in the setting of plaster. In addition, a lot of ornamental things, toys, and chemical plugging are made of plaster of paris.

Hence, option C is correct.