Setting of plaster of paris is

Setting of plaster of paris involves:

Setting of plaster of paris involves

(A) : Setting of plaster of paris involves hydration (R) : Plaster of paris is obtained by heating gypsum to 200^(@)C

Setting of plaster of Paris involves

The setting of plaster of paris involves

Setting of plaster of Paris involves: (A) The oxidation with atmospheric oxygen (B) The removal of water to form anhydrous calcium sulphate (C) The hydration to form the orthorhombic form of gypsum (D) The reaction with atmospheric carbon dioxide gas

How is plaster of paris prepared ? What is setting of plaster of paris ?