MCQOPTIONS
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				| 1. | 
                                    The main ingredient in dental plaster in_______________? | 
                            
| A. | Calcium sulphate hemihydrate | 
| B. | Calcium phosphate | 
| C. | Calcium anhydrate | 
| D. | Calcium sulphate dihydrate | 
| Answer» B. Calcium phosphate | |