 
			 
			MCQOPTIONS
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				| 1. | The ___________ operation, denoted by ‚àí, allows us to find tuples that are in one relation but are not in another.$ | 
| A. | Union | 
| B. | Set-difference | 
| C. | Difference | 
| D. | Intersection | 
| Answer» C. Difference | |