 
			 
			MCQOPTIONS
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				| 1. | WHAT_IS_UNDULATION??$ | 
| A. | Departure of the actual tooth surface from design surface | 
| B. | Departure of the virtual tooth surface from design surface | 
| C. | Departure of the design surface from actual tooth surface | 
| D. | Departure of the design surface from virtual tooth surface | 
| Answer» B. Departure of the virtual tooth surface from design surface | |