MCQOPTIONS
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				| 1. | 
                                    The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________? | 
                            
| A. | 19 | 
| B. | 20 | 
| C. | 21 | 
| D. | 26 | 
| Answer» B. 20 | |