The chemical formula of plaster of parts is [BPSC]

• A. \[CaS{{O}_{4}}.5{{H}_{2}}O\]    
• B.        \[2CaS{{O}_{4}}.{{H}_{2}}O\]
• C. \[(CaS{{O}_{4}}).2{{H}_{2}}O\]
• D. \[COSO4.MGO\]